Merge branch 'connected-subchannel' into ping-ping-ping-ping-ping-ping-ping-ping-ping

src/core/channel/channel_stack.c

@@ -101,11 +101,12 @@ grpc_call_element *grpc_call_stack_element(grpc_call_stack *call_stack,
   return CALL_ELEMS_FROM_STACK(call_stack) + index;
 }
 
-void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx,
+void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx, int initial_refs,
+                             grpc_iomgr_cb_func destroy, void *destroy_arg,
                              const grpc_channel_filter **filters,
-                             size_t filter_count, grpc_channel *master,
+                             size_t filter_count,
                              const grpc_channel_args *channel_args,
-                             grpc_channel_stack *stack) {
+                             const char *name, grpc_channel_stack *stack) {
   size_t call_size =
       ROUND_UP_TO_ALIGNMENT_SIZE(sizeof(grpc_call_stack)) +
       ROUND_UP_TO_ALIGNMENT_SIZE(filter_count * sizeof(grpc_call_element));
@@ -115,6 +116,8 @@ void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx,
   size_t i;
 
   stack->count = filter_count;
+  GRPC_STREAM_REF_INIT(&stack->refcount, initial_refs, destroy, destroy_arg,
+                       name);
   elems = CHANNEL_ELEMS_FROM_STACK(stack);
   user_data =
       ((char *)elems) +
@@ -122,7 +125,7 @@ void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx,
 
   /* init per-filter data */
   for (i = 0; i < filter_count; i++) {
-    args.master = master;
+    args.channel_stack = stack;
     args.channel_args = channel_args;
     args.is_first = i == 0;
     args.is_last = i == (filter_count - 1);
@@ -166,15 +169,15 @@ void grpc_call_stack_init(grpc_exec_ctx *exec_ctx,
   size_t i;
 
   call_stack->count = count;
-  gpr_ref_init(&call_stack->refcount.refs, initial_refs);
+  GRPC_STREAM_REF_INIT(&call_stack->refcount, initial_refs, destroy,
-  grpc_closure_init(&call_stack->refcount.destroy, destroy, destroy_arg);
+                       destroy_arg, "CALL_STACK");
   call_elems = CALL_ELEMS_FROM_STACK(call_stack);
   user_data = ((char *)call_elems) +
               ROUND_UP_TO_ALIGNMENT_SIZE(count * sizeof(grpc_call_element));
 
   /* init per-filter data */
   for (i = 0; i < count; i++) {
-    args.refcount = &call_stack->refcount;
+    args.call_stack = call_stack;
     args.server_transport_data = transport_server_data;
     args.context = context;
     call_elems[i].filter = channel_elems[i].filter;

src/core/channel/channel_stack.h

@@ -51,15 +51,18 @@
 typedef struct grpc_channel_element grpc_channel_element;
 typedef struct grpc_call_element grpc_call_element;
 
+typedef struct grpc_channel_stack grpc_channel_stack;
+typedef struct grpc_call_stack grpc_call_stack;
+
 typedef struct {
-  grpc_channel *master;
+  grpc_channel_stack *channel_stack;
   const grpc_channel_args *channel_args;
   int is_first;
   int is_last;
 } grpc_channel_element_args;
 
 typedef struct {
-  grpc_stream_refcount *refcount;
+  grpc_call_stack *call_stack;
   const void *server_transport_data;
   grpc_call_context_element *context;
 } grpc_call_element_args;
@@ -144,23 +147,24 @@ struct grpc_call_element {
 
 /* A channel stack tracks a set of related filters for one channel, and
    guarantees they live within a single malloc() allocation */
-typedef struct {
+struct grpc_channel_stack {
+  grpc_stream_refcount refcount;
   size_t count;
   /* Memory required for a call stack (computed at channel stack
      initialization) */
   size_t call_stack_size;
-} grpc_channel_stack;
+};
 
 /* A call stack tracks a set of related filters for one call, and guarantees
    they live within a single malloc() allocation */
-typedef struct {
+struct grpc_call_stack {
   /* shared refcount for this channel stack.
      MUST be the first element: the underlying code calls destroy
      with the address of the refcount, but higher layers prefer to think
      about the address of the call stack itself. */
   grpc_stream_refcount refcount;
   size_t count;
-} grpc_call_stack;
+};
 
 /* Get a channel element given a channel stack and its index */
 grpc_channel_element *grpc_channel_stack_element(grpc_channel_stack *stack,
@@ -175,11 +179,11 @@ grpc_call_element *grpc_call_stack_element(grpc_call_stack *stack, size_t i);
 size_t grpc_channel_stack_size(const grpc_channel_filter **filters,
                                size_t filter_count);
 /* Initialize a channel stack given some filters */
-void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx,
+void grpc_channel_stack_init(grpc_exec_ctx *exec_ctx, int initial_refs,
+                             grpc_iomgr_cb_func destroy, void *destroy_arg,
                              const grpc_channel_filter **filters,
-                             size_t filter_count, grpc_channel *master,
+                             size_t filter_count, const grpc_channel_args *args,
-                             const grpc_channel_args *args,
+                             const char *name, grpc_channel_stack *stack);
-                             grpc_channel_stack *stack);
 /* Destroy a channel stack */
 void grpc_channel_stack_destroy(grpc_exec_ctx *exec_ctx,
                                 grpc_channel_stack *stack);
@@ -199,14 +203,23 @@ void grpc_call_stack_set_pollset(grpc_exec_ctx *exec_ctx,
                                  grpc_pollset *pollset);
 
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
-#define grpc_call_stack_ref(call_stack, reason) \
+#define GRPC_CALL_STACK_REF(call_stack, reason) \
   grpc_stream_ref(&(call_stack)->refcount, reason)
-#define grpc_call_stack_unref(exec_ctx, call_stack, reason) \
+#define GRPC_CALL_STACK_UNREF(exec_ctx, call_stack, reason) \
   grpc_stream_unref(exec_ctx, &(call_stack)->refcount, reason)
+#define GRPC_CHANNEL_STACK_REF(channel_stack, reason) \
+  grpc_stream_ref(&(channel_stack)->refcount, reason)
+#define GRPC_CHANNEL_STACK_UNREF(exec_ctx, channel_stack, reason) \
+  grpc_stream_unref(exec_ctx, &(channel_stack)->refcount, reason)
 #else
-#define grpc_call_stack_ref(call_stack) grpc_stream_ref(&(call_stack)->refcount)
+#define GRPC_CALL_STACK_REF(call_stack, reason) \
-#define grpc_call_stack_unref(exec_ctx, call_stack) \
+  grpc_stream_ref(&(call_stack)->refcount)
+#define GRPC_CALL_STACK_UNREF(exec_ctx, call_stack, reason) \
   grpc_stream_unref(exec_ctx, &(call_stack)->refcount)
+#define GRPC_CHANNEL_STACK_REF(channel_stack, reason) \
+  grpc_stream_ref(&(channel_stack)->refcount)
+#define GRPC_CHANNEL_STACK_UNREF(exec_ctx, channel_stack, reason) \
+  grpc_stream_unref(exec_ctx, &(channel_stack)->refcount)
 #endif
 
 /* Destroy a call stack */

src/core/channel/client_channel.c

@@ -59,11 +59,6 @@ typedef struct client_channel_channel_data {
   grpc_resolver *resolver;
   /** have we started resolving this channel */
   int started_resolving;
-  /** master channel - the grpc_channel instance that ultimately owns
-      this channel_data via its channel stack.
-      We occasionally use this to bump the refcount on the master channel
-      to keep ourselves alive through an asynchronous operation. */
-  grpc_channel *master;
 
   /** mutex protecting client configuration, including all
       variables below in this data structure */
@@ -81,8 +76,10 @@ typedef struct client_channel_channel_data {
   grpc_connectivity_state_tracker state_tracker;
   /** when an lb_policy arrives, should we try to exit idle */
   int exit_idle_when_lb_policy_arrives;
-  /** pollset_set of interested parties in a new connection */
+  /** owning stack */
-  grpc_pollset_set pollset_set;
+  grpc_channel_stack *owning_stack;
+  /** interested parties */
+  grpc_pollset_set interested_parties;
 } channel_data;
 
 /** We create one watcher for each new lb_policy that is returned from a
@@ -103,9 +100,7 @@ typedef struct {
 } waiting_call;
 
 static char *cc_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
-  channel_data *chand = elem->channel_data;
+  return grpc_subchannel_call_holder_get_peer(exec_ctx, elem->call_data);
-  return grpc_subchannel_call_holder_get_peer(exec_ctx, elem->call_data,
-                                              chand->master);
 }
 
 static void cc_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
@@ -121,10 +116,18 @@ static void watch_lb_policy(grpc_exec_ctx *exec_ctx, channel_data *chand,
 
 static void on_lb_policy_state_changed_locked(
     grpc_exec_ctx *exec_ctx, lb_policy_connectivity_watcher *w) {
+  grpc_connectivity_state publish_state = w->state;
   /* check if the notification is for a stale policy */
   if (w->lb_policy != w->chand->lb_policy) return;
 
-  grpc_connectivity_state_set(exec_ctx, &w->chand->state_tracker, w->state,
+  if (publish_state == GRPC_CHANNEL_FATAL_FAILURE &&
+      w->chand->resolver != NULL) {
+    publish_state = GRPC_CHANNEL_TRANSIENT_FAILURE;
+    grpc_resolver_channel_saw_error(exec_ctx, w->chand->resolver);
+    GRPC_LB_POLICY_UNREF(exec_ctx, w->chand->lb_policy, "channel");
+    w->chand->lb_policy = NULL;
+  }
+  grpc_connectivity_state_set(exec_ctx, &w->chand->state_tracker, publish_state,
                               "lb_changed");
   if (w->state != GRPC_CHANNEL_FATAL_FAILURE) {
     watch_lb_policy(exec_ctx, w->chand, w->lb_policy, w->state);
@@ -139,7 +142,7 @@ static void on_lb_policy_state_changed(grpc_exec_ctx *exec_ctx, void *arg,
   on_lb_policy_state_changed_locked(exec_ctx, w);
   gpr_mu_unlock(&w->chand->mu_config);
 
-  GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, w->chand->master, "watch_lb_policy");
+  GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack, "watch_lb_policy");
   gpr_free(w);
 }
 
@@ -147,7 +150,7 @@ static void watch_lb_policy(grpc_exec_ctx *exec_ctx, channel_data *chand,
                             grpc_lb_policy *lb_policy,
                             grpc_connectivity_state current_state) {
   lb_policy_connectivity_watcher *w = gpr_malloc(sizeof(*w));
-  GRPC_CHANNEL_INTERNAL_REF(chand->master, "watch_lb_policy");
+  GRPC_CHANNEL_STACK_REF(chand->owning_stack, "watch_lb_policy");
 
   w->chand = chand;
   grpc_closure_init(&w->on_changed, on_lb_policy_state_changed, w);
@@ -179,6 +182,11 @@ static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg,
 
   chand->incoming_configuration = NULL;
 
+  if (lb_policy != NULL) {
+    grpc_pollset_set_add_pollset_set(exec_ctx, &lb_policy->interested_parties,
+                                     &chand->interested_parties);
+  }
+
   gpr_mu_lock(&chand->mu_config);
   old_lb_policy = chand->lb_policy;
   chand->lb_policy = lb_policy;
@@ -200,7 +208,7 @@ static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg,
       watch_lb_policy(exec_ctx, chand, lb_policy, state);
     }
     gpr_mu_unlock(&chand->mu_config);
-    GRPC_CHANNEL_INTERNAL_REF(chand->master, "resolver");
+    GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver");
     grpc_resolver_next(exec_ctx, resolver, &chand->incoming_configuration,
                        &chand->on_config_changed);
     GRPC_RESOLVER_UNREF(exec_ctx, resolver, "channel-next");
@@ -222,7 +230,9 @@ static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg,
   }
 
   if (old_lb_policy != NULL) {
-    grpc_lb_policy_shutdown(exec_ctx, old_lb_policy);
+    grpc_pollset_set_del_pollset_set(exec_ctx,
+                                     &old_lb_policy->interested_parties,
+                                     &chand->interested_parties);
     GRPC_LB_POLICY_UNREF(exec_ctx, old_lb_policy, "channel");
   }
 
@@ -230,13 +240,12 @@ static void cc_on_config_changed(grpc_exec_ctx *exec_ctx, void *arg,
     GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "config_change");
   }
 
-  GRPC_CHANNEL_INTERNAL_UNREF(exec_ctx, chand->master, "resolver");
+  GRPC_CHANNEL_STACK_UNREF(exec_ctx, chand->owning_stack, "resolver");
 }
 
 static void cc_start_transport_op(grpc_exec_ctx *exec_ctx,
                                   grpc_channel_element *elem,
                                   grpc_transport_op *op) {
-  grpc_lb_policy *lb_policy = NULL;
   channel_data *chand = elem->channel_data;
   grpc_resolver *destroy_resolver = NULL;
 
@@ -254,16 +263,11 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx,
     op->connectivity_state = NULL;
   }
 
-  lb_policy = chand->lb_policy;
-  if (lb_policy) {
-    GRPC_LB_POLICY_REF(lb_policy, "broadcast");
-  }
-
   if (op->send_ping != NULL) {
-    if (lb_policy == NULL) {
+    if (chand->lb_policy == NULL) {
       grpc_exec_ctx_enqueue(exec_ctx, op->send_ping, 0);
     } else {
-      grpc_lb_policy_ping_one(exec_ctx, lb_policy, op->bind_pollset, op->send_ping);
+      grpc_lb_policy_ping_one(exec_ctx, chand->lb_policy, op->bind_pollset, op->send_ping);
       op->bind_pollset = NULL;
     }
     op->send_ping = NULL;
@@ -275,7 +279,9 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx,
     destroy_resolver = chand->resolver;
     chand->resolver = NULL;
     if (chand->lb_policy != NULL) {
-      grpc_lb_policy_shutdown(exec_ctx, chand->lb_policy);
+      grpc_pollset_set_del_pollset_set(exec_ctx,
+                                       &chand->lb_policy->interested_parties,
+                                       &chand->interested_parties);
       GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
       chand->lb_policy = NULL;
     }
@@ -286,16 +292,11 @@ static void cc_start_transport_op(grpc_exec_ctx *exec_ctx,
     grpc_resolver_shutdown(exec_ctx, destroy_resolver);
     GRPC_RESOLVER_UNREF(exec_ctx, destroy_resolver, "channel");
   }
-
-  if (lb_policy) {
-    grpc_lb_policy_broadcast(exec_ctx, lb_policy, op);
-    GRPC_LB_POLICY_UNREF(exec_ctx, lb_policy, "broadcast");
-  }
 }
 
 typedef struct {
   grpc_metadata_batch *initial_metadata;
-  grpc_subchannel **subchannel;
+  grpc_connected_subchannel **connected_subchannel;
   grpc_closure *on_ready;
   grpc_call_element *elem;
   grpc_closure closure;
@@ -303,17 +304,17 @@ typedef struct {
 
 static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *arg,
                               grpc_metadata_batch *initial_metadata,
-                              grpc_subchannel **subchannel,
+                              grpc_connected_subchannel **connected_subchannel,
                               grpc_closure *on_ready);
 
 static void continue_picking(grpc_exec_ctx *exec_ctx, void *arg, int success) {
   continue_picking_args *cpa = arg;
   if (!success) {
     grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, 0);
-  } else if (cpa->subchannel == NULL) {
+  } else if (cpa->connected_subchannel == NULL) {
     /* cancelled, do nothing */
   } else if (cc_pick_subchannel(exec_ctx, cpa->elem, cpa->initial_metadata,
-                                cpa->subchannel, cpa->on_ready)) {
+                                cpa->connected_subchannel, cpa->on_ready)) {
     grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, 1);
   }
   gpr_free(cpa);
@@ -321,7 +322,7 @@ static void continue_picking(grpc_exec_ctx *exec_ctx, void *arg, int success) {
 
 static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp,
                               grpc_metadata_batch *initial_metadata,
-                              grpc_subchannel **subchannel,
+                              grpc_connected_subchannel **connected_subchannel,
                               grpc_closure *on_ready) {
   grpc_call_element *elem = elemp;
   channel_data *chand = elem->channel_data;
@@ -329,18 +330,19 @@ static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp,
   continue_picking_args *cpa;
   grpc_closure *closure;
 
-  GPR_ASSERT(subchannel);
+  GPR_ASSERT(connected_subchannel);
 
   gpr_mu_lock(&chand->mu_config);
   if (initial_metadata == NULL) {
     if (chand->lb_policy != NULL) {
-      grpc_lb_policy_cancel_pick(exec_ctx, chand->lb_policy, subchannel);
+      grpc_lb_policy_cancel_pick(exec_ctx, chand->lb_policy,
+                                 connected_subchannel);
     }
     for (closure = chand->waiting_for_config_closures.head; closure != NULL;
          closure = grpc_closure_next(closure)) {
       cpa = closure->cb_arg;
-      if (cpa->subchannel == subchannel) {
+      if (cpa->connected_subchannel == connected_subchannel) {
-        cpa->subchannel = NULL;
+        cpa->connected_subchannel = NULL;
         grpc_exec_ctx_enqueue(exec_ctx, cpa->on_ready, 0);
       }
     }
@@ -348,21 +350,22 @@ static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp,
     return 1;
   }
   if (chand->lb_policy != NULL) {
-    int r = grpc_lb_policy_pick(exec_ctx, chand->lb_policy, calld->pollset,
+    int r =
-                                initial_metadata, subchannel, on_ready);
+        grpc_lb_policy_pick(exec_ctx, chand->lb_policy, calld->pollset,
+                            initial_metadata, connected_subchannel, on_ready);
     gpr_mu_unlock(&chand->mu_config);
     return r;
   }
   if (chand->resolver != NULL && !chand->started_resolving) {
     chand->started_resolving = 1;
-    GRPC_CHANNEL_INTERNAL_REF(chand->master, "resolver");
+    GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver");
     grpc_resolver_next(exec_ctx, chand->resolver,
                        &chand->incoming_configuration,
                        &chand->on_config_changed);
   }
   cpa = gpr_malloc(sizeof(*cpa));
   cpa->initial_metadata = initial_metadata;
-  cpa->subchannel = subchannel;
+  cpa->connected_subchannel = connected_subchannel;
   cpa->on_ready = on_ready;
   cpa->elem = elem;
   grpc_closure_init(&cpa->closure, continue_picking, cpa);
@@ -374,7 +377,8 @@ static int cc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *elemp,
 /* Constructor for call_data */
 static void init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
                            grpc_call_element_args *args) {
-  grpc_subchannel_call_holder_init(elem->call_data, cc_pick_subchannel, elem);
+  grpc_subchannel_call_holder_init(elem->call_data, cc_pick_subchannel, elem,
+                                   args->call_stack);
 }
 
 /* Destructor for call_data */
@@ -395,12 +399,12 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
   GPR_ASSERT(elem->filter == &grpc_client_channel_filter);
 
   gpr_mu_init(&chand->mu_config);
-  chand->master = args->master;
-  grpc_pollset_set_init(&chand->pollset_set);
   grpc_closure_init(&chand->on_config_changed, cc_on_config_changed, chand);
+  chand->owning_stack = args->channel_stack;
 
   grpc_connectivity_state_init(&chand->state_tracker, GRPC_CHANNEL_IDLE,
                                "client_channel");
+  grpc_pollset_set_init(&chand->interested_parties);
 }
 
 /* Destructor for channel_data */
@@ -413,10 +417,13 @@ static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
     GRPC_RESOLVER_UNREF(exec_ctx, chand->resolver, "channel");
   }
   if (chand->lb_policy != NULL) {
+    grpc_pollset_set_del_pollset_set(exec_ctx,
+                                     &chand->lb_policy->interested_parties,
+                                     &chand->interested_parties);
     GRPC_LB_POLICY_UNREF(exec_ctx, chand->lb_policy, "channel");
   }
   grpc_connectivity_state_destroy(exec_ctx, &chand->state_tracker);
-  grpc_pollset_set_destroy(&chand->pollset_set);
+  grpc_pollset_set_destroy(&chand->interested_parties);
   gpr_mu_destroy(&chand->mu_config);
 }
 
@@ -445,7 +452,7 @@ void grpc_client_channel_set_resolver(grpc_exec_ctx *exec_ctx,
   if (!grpc_closure_list_empty(chand->waiting_for_config_closures) ||
       chand->exit_idle_when_lb_policy_arrives) {
     chand->started_resolving = 1;
-    GRPC_CHANNEL_INTERNAL_REF(chand->master, "resolver");
+    GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver");
     grpc_resolver_next(exec_ctx, resolver, &chand->incoming_configuration,
                        &chand->on_config_changed);
   }
@@ -464,7 +471,7 @@ grpc_connectivity_state grpc_client_channel_check_connectivity_state(
     } else {
       chand->exit_idle_when_lb_policy_arrives = 1;
       if (!chand->started_resolving && chand->resolver != NULL) {
-        GRPC_CHANNEL_INTERNAL_REF(chand->master, "resolver");
+        GRPC_CHANNEL_STACK_REF(chand->owning_stack, "resolver");
         chand->started_resolving = 1;
         grpc_resolver_next(exec_ctx, chand->resolver,
                            &chand->incoming_configuration,
@@ -476,32 +483,39 @@ grpc_connectivity_state grpc_client_channel_check_connectivity_state(
   return out;
 }
 
+typedef struct {
+  channel_data *chand;
+  grpc_pollset *pollset;
+  grpc_closure *on_complete;
+  grpc_closure my_closure;
+} external_connectivity_watcher;
+
+static void on_external_watch_complete(grpc_exec_ctx *exec_ctx, void *arg,
+                                       int iomgr_success) {
+  external_connectivity_watcher *w = arg;
+  grpc_closure *follow_up = w->on_complete;
+  grpc_pollset_set_del_pollset(exec_ctx, &w->chand->interested_parties,
+                               w->pollset);
+  GRPC_CHANNEL_STACK_UNREF(exec_ctx, w->chand->owning_stack,
+                           "external_connectivity_watcher");
+  gpr_free(w);
+  follow_up->cb(exec_ctx, follow_up->cb_arg, iomgr_success);
+}
+
 void grpc_client_channel_watch_connectivity_state(
-    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
+    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_pollset *pollset,
     grpc_connectivity_state *state, grpc_closure *on_complete) {
   channel_data *chand = elem->channel_data;
+  external_connectivity_watcher *w = gpr_malloc(sizeof(*w));
+  w->chand = chand;
+  w->pollset = pollset;
+  w->on_complete = on_complete;
+  grpc_pollset_set_add_pollset(exec_ctx, &chand->interested_parties, pollset);
+  grpc_closure_init(&w->my_closure, on_external_watch_complete, w);
+  GRPC_CHANNEL_STACK_REF(w->chand->owning_stack,
+                         "external_connectivity_watcher");
   gpr_mu_lock(&chand->mu_config);
   grpc_connectivity_state_notify_on_state_change(
-      exec_ctx, &chand->state_tracker, state, on_complete);
+      exec_ctx, &chand->state_tracker, state, &w->my_closure);
   gpr_mu_unlock(&chand->mu_config);
 }
-
-grpc_pollset_set *grpc_client_channel_get_connecting_pollset_set(
-    grpc_channel_element *elem) {
-  channel_data *chand = elem->channel_data;
-  return &chand->pollset_set;
-}
-
-void grpc_client_channel_add_interested_party(grpc_exec_ctx *exec_ctx,
-                                              grpc_channel_element *elem,
-                                              grpc_pollset *pollset) {
-  channel_data *chand = elem->channel_data;
-  grpc_pollset_set_add_pollset(exec_ctx, &chand->pollset_set, pollset);
-}
-
-void grpc_client_channel_del_interested_party(grpc_exec_ctx *exec_ctx,
-                                              grpc_channel_element *elem,
-                                              grpc_pollset *pollset) {
-  channel_data *chand = elem->channel_data;
-  grpc_pollset_set_del_pollset(exec_ctx, &chand->pollset_set, pollset);
-}

src/core/channel/client_channel.h

@@ -57,17 +57,7 @@ grpc_connectivity_state grpc_client_channel_check_connectivity_state(
     grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, int try_to_connect);
 
 void grpc_client_channel_watch_connectivity_state(
-    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
+    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_pollset *pollset,
     grpc_connectivity_state *state, grpc_closure *on_complete);
 
-grpc_pollset_set *grpc_client_channel_get_connecting_pollset_set(
-    grpc_channel_element *elem);
-
-void grpc_client_channel_add_interested_party(grpc_exec_ctx *exec_ctx,
-                                              grpc_channel_element *channel,
-                                              grpc_pollset *pollset);
-void grpc_client_channel_del_interested_party(grpc_exec_ctx *exec_ctx,
-                                              grpc_channel_element *channel,
-                                              grpc_pollset *pollset);
-
 #endif /* GRPC_INTERNAL_CORE_CHANNEL_CLIENT_CHANNEL_H */

src/core/channel/client_uchannel.c

@@ -58,13 +58,13 @@ typedef struct client_uchannel_channel_data {
       this channel_data via its channel stack.
       We occasionally use this to bump the refcount on the master channel
       to keep ourselves alive through an asynchronous operation. */
-  grpc_channel *master;
+  grpc_channel_stack *owning_stack;
 
   /** connectivity state being tracked */
   grpc_connectivity_state_tracker state_tracker;
 
   /** the subchannel wrapped by the microchannel */
-  grpc_subchannel *subchannel;
+  grpc_connected_subchannel *connected_subchannel;
 
   /** the callback used to stay subscribed to subchannel connectivity
    * notifications */
@@ -84,15 +84,13 @@ static void monitor_subchannel(grpc_exec_ctx *exec_ctx, void *arg,
   grpc_connectivity_state_set(exec_ctx, &chand->state_tracker,
                               chand->subchannel_connectivity,
                               "uchannel_monitor_subchannel");
-  grpc_subchannel_notify_on_state_change(exec_ctx, chand->subchannel,
+  grpc_connected_subchannel_notify_on_state_change(
-                                         &chand->subchannel_connectivity,
+      exec_ctx, chand->connected_subchannel, NULL,
-                                         &chand->connectivity_cb);
+      &chand->subchannel_connectivity, &chand->connectivity_cb);
 }
 
 static char *cuc_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
-  channel_data *chand = elem->channel_data;
+  return grpc_subchannel_call_holder_get_peer(exec_ctx, elem->call_data);
-  return grpc_subchannel_call_holder_get_peer(exec_ctx, elem->call_data,
-                                              chand->master);
 }
 
 static void cuc_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
@@ -128,11 +126,11 @@ static void cuc_start_transport_op(grpc_exec_ctx *exec_ctx,
 
 static int cuc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *arg,
                                grpc_metadata_batch *initial_metadata,
-                               grpc_subchannel **subchannel,
+                               grpc_connected_subchannel **connected_subchannel,
                                grpc_closure *on_ready) {
   channel_data *chand = arg;
   GPR_ASSERT(initial_metadata != NULL);
-  *subchannel = chand->subchannel;
+  *connected_subchannel = chand->connected_subchannel;
   return 1;
 }
 
@@ -140,7 +138,7 @@ static int cuc_pick_subchannel(grpc_exec_ctx *exec_ctx, void *arg,
 static void cuc_init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
                                grpc_call_element_args *args) {
   grpc_subchannel_call_holder_init(elem->call_data, cuc_pick_subchannel,
-                                   elem->channel_data);
+                                   elem->channel_data, args->call_stack);
 }
 
 /* Destructor for call_data */
@@ -158,7 +156,7 @@ static void cuc_init_channel_elem(grpc_exec_ctx *exec_ctx,
   grpc_closure_init(&chand->connectivity_cb, monitor_subchannel, chand);
   GPR_ASSERT(args->is_last);
   GPR_ASSERT(elem->filter == &grpc_client_uchannel_filter);
-  chand->master = args->master;
+  chand->owning_stack = args->channel_stack;
   grpc_connectivity_state_init(&chand->state_tracker, GRPC_CHANNEL_IDLE,
                                "client_uchannel");
   gpr_mu_init(&chand->mu_state);
@@ -168,10 +166,14 @@ static void cuc_init_channel_elem(grpc_exec_ctx *exec_ctx,
 static void cuc_destroy_channel_elem(grpc_exec_ctx *exec_ctx,
                                      grpc_channel_element *elem) {
   channel_data *chand = elem->channel_data;
-  grpc_subchannel_state_change_unsubscribe(exec_ctx, chand->subchannel,
+  /* cancel subscription */
-                                           &chand->connectivity_cb);
+  grpc_connected_subchannel_notify_on_state_change(
+      exec_ctx, chand->connected_subchannel, NULL, NULL,
+      &chand->connectivity_cb);
   grpc_connectivity_state_destroy(exec_ctx, &chand->state_tracker);
   gpr_mu_destroy(&chand->mu_state);
+  GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, chand->connected_subchannel,
+                                  "uchannel");
 }
 
 static void cuc_set_pollset(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
@@ -191,23 +193,14 @@ grpc_connectivity_state grpc_client_uchannel_check_connectivity_state(
     grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, int try_to_connect) {
   channel_data *chand = elem->channel_data;
   grpc_connectivity_state out;
-  out = grpc_connectivity_state_check(&chand->state_tracker);
   gpr_mu_lock(&chand->mu_state);
-  if (out == GRPC_CHANNEL_IDLE && try_to_connect) {
+  out = grpc_connectivity_state_check(&chand->state_tracker);
-    grpc_connectivity_state_set(exec_ctx, &chand->state_tracker,
-                                GRPC_CHANNEL_CONNECTING,
-                                "uchannel_connecting_changed");
-    chand->subchannel_connectivity = out;
-    grpc_subchannel_notify_on_state_change(exec_ctx, chand->subchannel,
-                                           &chand->subchannel_connectivity,
-                                           &chand->connectivity_cb);
-  }
   gpr_mu_unlock(&chand->mu_state);
   return out;
 }
 
 void grpc_client_uchannel_watch_connectivity_state(
-    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
+    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_pollset *pollset,
     grpc_connectivity_state *state, grpc_closure *on_complete) {
   channel_data *chand = elem->channel_data;
   gpr_mu_lock(&chand->mu_state);
@@ -216,40 +209,11 @@ void grpc_client_uchannel_watch_connectivity_state(
   gpr_mu_unlock(&chand->mu_state);
 }
 
-grpc_pollset_set *grpc_client_uchannel_get_connecting_pollset_set(
-    grpc_channel_element *elem) {
-  channel_data *chand = elem->channel_data;
-  grpc_channel_element *parent_elem;
-  gpr_mu_lock(&chand->mu_state);
-  parent_elem = grpc_channel_stack_last_element(grpc_channel_get_channel_stack(
-      grpc_subchannel_get_master(chand->subchannel)));
-  gpr_mu_unlock(&chand->mu_state);
-  return grpc_client_channel_get_connecting_pollset_set(parent_elem);
-}
-
-void grpc_client_uchannel_add_interested_party(grpc_exec_ctx *exec_ctx,
-                                               grpc_channel_element *elem,
-                                               grpc_pollset *pollset) {
-  grpc_pollset_set *master_pollset_set =
-      grpc_client_uchannel_get_connecting_pollset_set(elem);
-  grpc_pollset_set_add_pollset(exec_ctx, master_pollset_set, pollset);
-}
-
-void grpc_client_uchannel_del_interested_party(grpc_exec_ctx *exec_ctx,
-                                               grpc_channel_element *elem,
-                                               grpc_pollset *pollset) {
-  grpc_pollset_set *master_pollset_set =
-      grpc_client_uchannel_get_connecting_pollset_set(elem);
-  grpc_pollset_set_del_pollset(exec_ctx, master_pollset_set, pollset);
-}
-
 grpc_channel *grpc_client_uchannel_create(grpc_subchannel *subchannel,
                                           grpc_channel_args *args) {
   grpc_channel *channel = NULL;
 #define MAX_FILTERS 3
   const grpc_channel_filter *filters[MAX_FILTERS];
-  grpc_channel *master = grpc_subchannel_get_master(subchannel);
-  char *target = grpc_channel_get_target(master);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   size_t n = 0;
 
@@ -261,19 +225,19 @@ grpc_channel *grpc_client_uchannel_create(grpc_subchannel *subchannel,
   GPR_ASSERT(n <= MAX_FILTERS);
 
   channel =
-      grpc_channel_create_from_filters(&exec_ctx, target, filters, n, args, 1);
+      grpc_channel_create_from_filters(&exec_ctx, NULL, filters, n, args, 1);
 
-  gpr_free(target);
   return channel;
 }
 
-void grpc_client_uchannel_set_subchannel(grpc_channel *uchannel,
+void grpc_client_uchannel_set_connected_subchannel(
-                                         grpc_subchannel *subchannel) {
+    grpc_channel *uchannel, grpc_connected_subchannel *connected_subchannel) {
   grpc_channel_element *elem =
       grpc_channel_stack_last_element(grpc_channel_get_channel_stack(uchannel));
   channel_data *chand = elem->channel_data;
   GPR_ASSERT(elem->filter == &grpc_client_uchannel_filter);
   gpr_mu_lock(&chand->mu_state);
-  chand->subchannel = subchannel;
+  chand->connected_subchannel = connected_subchannel;
+  GRPC_CONNECTED_SUBCHANNEL_REF(connected_subchannel, "uchannel");
   gpr_mu_unlock(&chand->mu_state);
 }

src/core/channel/client_uchannel.h

@@ -48,23 +48,13 @@ grpc_connectivity_state grpc_client_uchannel_check_connectivity_state(
     grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, int try_to_connect);
 
 void grpc_client_uchannel_watch_connectivity_state(
-    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem,
+    grpc_exec_ctx *exec_ctx, grpc_channel_element *elem, grpc_pollset *pollset,
     grpc_connectivity_state *state, grpc_closure *on_complete);
 
-grpc_pollset_set *grpc_client_uchannel_get_connecting_pollset_set(
-    grpc_channel_element *elem);
-
-void grpc_client_uchannel_add_interested_party(grpc_exec_ctx *exec_ctx,
-                                               grpc_channel_element *channel,
-                                               grpc_pollset *pollset);
-void grpc_client_uchannel_del_interested_party(grpc_exec_ctx *exec_ctx,
-                                               grpc_channel_element *channel,
-                                               grpc_pollset *pollset);
-
 grpc_channel *grpc_client_uchannel_create(grpc_subchannel *subchannel,
                                           grpc_channel_args *args);
 
-void grpc_client_uchannel_set_subchannel(grpc_channel *uchannel,
+void grpc_client_uchannel_set_connected_subchannel(
-                                         grpc_subchannel *subchannel);
+    grpc_channel *uchannel, grpc_connected_subchannel *connected_subchannel);
 
 #endif /* GRPC_INTERNAL_CORE_CHANNEL_CLIENT_MICROCHANNEL_H */

src/core/channel/compress_filter.c

@@ -288,8 +288,7 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
 
 /* Destructor for channel data */
 static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
-                                 grpc_channel_element *elem) {
+                                 grpc_channel_element *elem) {}
-}
 
 const grpc_channel_filter grpc_compress_filter = {
     compress_start_transport_stream_op, grpc_channel_next_op, sizeof(call_data),

src/core/channel/connected_channel.c

@@ -89,9 +89,9 @@ static void init_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem,
   int r;
 
   GPR_ASSERT(elem->filter == &grpc_connected_channel_filter);
-  r = grpc_transport_init_stream(exec_ctx, chand->transport,
+  r = grpc_transport_init_stream(
-                                 TRANSPORT_STREAM_FROM_CALL_DATA(calld),
+      exec_ctx, chand->transport, TRANSPORT_STREAM_FROM_CALL_DATA(calld),
-                                 args->refcount, args->server_transport_data);
+      &args->call_stack->refcount, args->server_transport_data);
   GPR_ASSERT(r == 0);
 }
 

src/core/channel/http_server_filter.c

@@ -225,8 +225,7 @@ static void init_channel_elem(grpc_exec_ctx *exec_ctx,
 
 /* Destructor for channel data */
 static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,
-                                 grpc_channel_element *elem) {
+                                 grpc_channel_element *elem) {}
-}
 
 const grpc_channel_filter grpc_http_server_filter = {
     hs_start_transport_op, grpc_channel_next_op, sizeof(call_data),

src/core/channel/subchannel_call_holder.c

@@ -44,7 +44,6 @@
 
 static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *holder,
                              int success);
-static void call_ready(grpc_exec_ctx *exec_ctx, void *holder, int success);
 static void retry_ops(grpc_exec_ctx *exec_ctx, void *retry_ops_args,
                       int success);
 
@@ -58,16 +57,17 @@ static void retry_waiting_locked(grpc_exec_ctx *exec_ctx,
 void grpc_subchannel_call_holder_init(
     grpc_subchannel_call_holder *holder,
     grpc_subchannel_call_holder_pick_subchannel pick_subchannel,
-    void *pick_subchannel_arg) {
+    void *pick_subchannel_arg, grpc_call_stack *owning_call) {
   gpr_atm_rel_store(&holder->subchannel_call, 0);
   holder->pick_subchannel = pick_subchannel;
   holder->pick_subchannel_arg = pick_subchannel_arg;
   gpr_mu_init(&holder->mu);
-  holder->subchannel = NULL;
+  holder->connected_subchannel = NULL;
   holder->waiting_ops = NULL;
   holder->waiting_ops_count = 0;
   holder->waiting_ops_capacity = 0;
   holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING;
+  holder->owning_call = owning_call;
 }
 
 void grpc_subchannel_call_holder_destroy(grpc_exec_ctx *exec_ctx,
@@ -125,13 +125,9 @@ retry:
         case GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING:
           fail_locked(exec_ctx, holder);
           break;
-        case GRPC_SUBCHANNEL_CALL_HOLDER_CREATING_CALL:
-          grpc_subchannel_cancel_create_call(exec_ctx, holder->subchannel,
-                                             &holder->subchannel_call);
-          break;
         case GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL:
           holder->pick_subchannel(exec_ctx, holder->pick_subchannel_arg, NULL,
-                                  &holder->subchannel, NULL);
+                                  &holder->connected_subchannel, NULL);
           break;
       }
       gpr_mu_unlock(&holder->mu);
@@ -142,28 +138,27 @@ retry:
   }
   /* if we don't have a subchannel, try to get one */
   if (holder->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING &&
-      holder->subchannel == NULL && op->send_initial_metadata != NULL) {
+      holder->connected_subchannel == NULL &&
+      op->send_initial_metadata != NULL) {
     holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL;
     grpc_closure_init(&holder->next_step, subchannel_ready, holder);
-    if (holder->pick_subchannel(exec_ctx, holder->pick_subchannel_arg,
+    GRPC_CALL_STACK_REF(holder->owning_call, "pick_subchannel");
-                                op->send_initial_metadata, &holder->subchannel,
+    if (holder->pick_subchannel(
-                                &holder->next_step)) {
+            exec_ctx, holder->pick_subchannel_arg, op->send_initial_metadata,
+            &holder->connected_subchannel, &holder->next_step)) {
       holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING;
+      GRPC_CALL_STACK_UNREF(exec_ctx, holder->owning_call, "pick_subchannel");
     }
   }
   /* if we've got a subchannel, then let's ask it to create a call */
   if (holder->creation_phase == GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING &&
-      holder->subchannel != NULL) {
+      holder->connected_subchannel != NULL) {
-    holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_CREATING_CALL;
+    gpr_atm_rel_store(
-    grpc_closure_init(&holder->next_step, call_ready, holder);
+        &holder->subchannel_call,
-    if (grpc_subchannel_create_call(exec_ctx, holder->subchannel,
+        (gpr_atm)(gpr_uintptr)grpc_connected_subchannel_create_call(
-                                    holder->pollset, &holder->subchannel_call,
+            exec_ctx, holder->connected_subchannel, holder->pollset));
-                                    &holder->next_step)) {
+    retry_waiting_locked(exec_ctx, holder);
-      /* got one immediately - continue the op (and any waiting ops) */
+    goto retry;
-      holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING;
-      retry_waiting_locked(exec_ctx, holder);
-      goto retry;
-    }
   }
   /* nothing to be done but wait */
   add_waiting_locked(holder, op);
@@ -179,36 +174,18 @@ static void subchannel_ready(grpc_exec_ctx *exec_ctx, void *arg, int success) {
              GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL);
   call = GET_CALL(holder);
   GPR_ASSERT(call == NULL || call == CANCELLED_CALL);
-  if (holder->subchannel == NULL) {
+  holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING;
-    holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING;
+  if (holder->connected_subchannel == NULL) {
     fail_locked(exec_ctx, holder);
   } else {
-    grpc_closure_init(&holder->next_step, call_ready, holder);
+    gpr_atm_rel_store(
-    if (grpc_subchannel_create_call(exec_ctx, holder->subchannel,
+        &holder->subchannel_call,
-                                    holder->pollset, &holder->subchannel_call,
+        (gpr_atm)(gpr_uintptr)grpc_connected_subchannel_create_call(
-                                    &holder->next_step)) {
+            exec_ctx, holder->connected_subchannel, holder->pollset));
-      holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING;
-      /* got one immediately - continue the op (and any waiting ops) */
-      retry_waiting_locked(exec_ctx, holder);
-    }
-  }
-  gpr_mu_unlock(&holder->mu);
-}
-
-static void call_ready(grpc_exec_ctx *exec_ctx, void *arg, int success) {
-  grpc_subchannel_call_holder *holder = arg;
-  GPR_TIMER_BEGIN("call_ready", 0);
-  gpr_mu_lock(&holder->mu);
-  GPR_ASSERT(holder->creation_phase ==
-             GRPC_SUBCHANNEL_CALL_HOLDER_CREATING_CALL);
-  holder->creation_phase = GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING;
-  if (GET_CALL(holder) != NULL) {
     retry_waiting_locked(exec_ctx, holder);
-  } else {
-    fail_locked(exec_ctx, holder);
   }
   gpr_mu_unlock(&holder->mu);
-  GPR_TIMER_END("call_ready", 0);
+  GRPC_CALL_STACK_UNREF(exec_ctx, holder->owning_call, "pick_subchannel");
 }
 
 typedef struct {
@@ -270,14 +247,13 @@ static void fail_locked(grpc_exec_ctx *exec_ctx,
   holder->waiting_ops_count = 0;
 }
 
-char *grpc_subchannel_call_holder_get_peer(grpc_exec_ctx *exec_ctx,
+char *grpc_subchannel_call_holder_get_peer(
-                                           grpc_subchannel_call_holder *holder,
+    grpc_exec_ctx *exec_ctx, grpc_subchannel_call_holder *holder) {
-                                           grpc_channel *master) {
   grpc_subchannel_call *subchannel_call = GET_CALL(holder);
 
   if (subchannel_call) {
     return grpc_subchannel_call_get_peer(exec_ctx, subchannel_call);
   } else {
-    return grpc_channel_get_target(master);
+    return NULL;
   }
 }

src/core/channel/subchannel_call_holder.h

@@ -42,12 +42,11 @@
     called when the subchannel is available) */
 typedef int (*grpc_subchannel_call_holder_pick_subchannel)(
     grpc_exec_ctx *exec_ctx, void *arg, grpc_metadata_batch *initial_metadata,
-    grpc_subchannel **subchannel, grpc_closure *on_ready);
+    grpc_connected_subchannel **connected_subchannel, grpc_closure *on_ready);
 
 typedef enum {
   GRPC_SUBCHANNEL_CALL_HOLDER_NOT_CREATING,
-  GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL,
+  GRPC_SUBCHANNEL_CALL_HOLDER_PICKING_SUBCHANNEL
-  GRPC_SUBCHANNEL_CALL_HOLDER_CREATING_CALL
 } grpc_subchannel_call_holder_creation_phase;
 
 /** Wrapper for holding a pointer to grpc_subchannel_call, and the
@@ -71,7 +70,7 @@ typedef struct grpc_subchannel_call_holder {
   gpr_mu mu;
 
   grpc_subchannel_call_holder_creation_phase creation_phase;
-  grpc_subchannel *subchannel;
+  grpc_connected_subchannel *connected_subchannel;
   grpc_pollset *pollset;
 
   grpc_transport_stream_op *waiting_ops;
@@ -79,12 +78,14 @@ typedef struct grpc_subchannel_call_holder {
   size_t waiting_ops_capacity;
 
   grpc_closure next_step;
+
+  grpc_call_stack *owning_call;
 } grpc_subchannel_call_holder;
 
 void grpc_subchannel_call_holder_init(
     grpc_subchannel_call_holder *holder,
     grpc_subchannel_call_holder_pick_subchannel pick_subchannel,
-    void *pick_subchannel_arg);
+    void *pick_subchannel_arg, grpc_call_stack *owning_call);
 void grpc_subchannel_call_holder_destroy(grpc_exec_ctx *exec_ctx,
                                          grpc_subchannel_call_holder *holder);
 
@@ -92,7 +93,6 @@ void grpc_subchannel_call_holder_perform_op(grpc_exec_ctx *exec_ctx,
                                             grpc_subchannel_call_holder *holder,
                                             grpc_transport_stream_op *op);
 char *grpc_subchannel_call_holder_get_peer(grpc_exec_ctx *exec_ctx,
-                                           grpc_subchannel_call_holder *holder,
+                                           grpc_subchannel_call_holder *holder);
-                                           grpc_channel *master);
 
 #endif

src/core/client_config/lb_policies/pick_first.c

@@ -42,7 +42,7 @@
 typedef struct pending_pick {
   struct pending_pick *next;
   grpc_pollset *pollset;
-  grpc_subchannel **target;
+  grpc_connected_subchannel **target;
   grpc_closure *on_complete;
 } pending_pick;
 
@@ -60,7 +60,7 @@ typedef struct {
   /** the selected channel
       TODO(ctiller): this should be atomically set so we don't
                      need to take a mutex in the common case */
-  grpc_subchannel *selected;
+  grpc_connected_subchannel *selected;
   /** have we started picking? */
   int started_picking;
   /** are we shut down? */
@@ -76,24 +76,6 @@ typedef struct {
   grpc_connectivity_state_tracker state_tracker;
 } pick_first_lb_policy;
 
-static void del_interested_parties_locked(grpc_exec_ctx *exec_ctx,
-                                          pick_first_lb_policy *p) {
-  pending_pick *pp;
-  for (pp = p->pending_picks; pp; pp = pp->next) {
-    grpc_subchannel_del_interested_party(
-        exec_ctx, p->subchannels[p->checking_subchannel], pp->pollset);
-  }
-}
-
-static void add_interested_parties_locked(grpc_exec_ctx *exec_ctx,
-                                          pick_first_lb_policy *p) {
-  pending_pick *pp;
-  for (pp = p->pending_picks; pp; pp = pp->next) {
-    grpc_subchannel_add_interested_party(
-        exec_ctx, p->subchannels[p->checking_subchannel], pp->pollset);
-  }
-}
-
 void pf_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   size_t i;
@@ -102,7 +84,7 @@ void pf_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
     GRPC_SUBCHANNEL_UNREF(exec_ctx, p->subchannels[i], "pick_first");
   }
   if (p->selected) {
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, p->selected, "picked_first");
+    GRPC_CONNECTED_SUBCHANNEL_UNREF(exec_ctx, p->selected, "picked_first");
   }
   grpc_connectivity_state_destroy(exec_ctx, &p->state_tracker);
   gpr_free(p->subchannels);
@@ -114,16 +96,26 @@ void pf_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   pending_pick *pp;
   gpr_mu_lock(&p->mu);
-  del_interested_parties_locked(exec_ctx, p);
   p->shutdown = 1;
   pp = p->pending_picks;
   p->pending_picks = NULL;
   grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                               GRPC_CHANNEL_FATAL_FAILURE, "shutdown");
+  /* cancel subscription */
+  if (p->selected != NULL) {
+    grpc_connected_subchannel_notify_on_state_change(
+        exec_ctx, p->selected, NULL, NULL, &p->connectivity_changed);
+  } else {
+    grpc_subchannel_notify_on_state_change(
+        exec_ctx, p->subchannels[p->checking_subchannel], NULL, NULL,
+        &p->connectivity_changed);
+  }
   gpr_mu_unlock(&p->mu);
   while (pp != NULL) {
     pending_pick *next = pp->next;
     *pp->target = NULL;
+    grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
+                                 pp->pollset);
     grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
     gpr_free(pp);
     pp = next;
@@ -131,7 +123,7 @@ void pf_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
 }
 
 static void pf_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
-                           grpc_subchannel **target) {
+                           grpc_connected_subchannel **target) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   pending_pick *pp;
   gpr_mu_lock(&p->mu);
@@ -140,8 +132,8 @@ static void pf_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
   while (pp != NULL) {
     pending_pick *next = pp->next;
     if (pp->target == target) {
-      grpc_subchannel_del_interested_party(
+      grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
-          exec_ctx, p->subchannels[p->checking_subchannel], pp->pollset);
+                                   pp->pollset);
       *target = NULL;
       grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 0);
       gpr_free(pp);
@@ -158,10 +150,11 @@ static void start_picking(grpc_exec_ctx *exec_ctx, pick_first_lb_policy *p) {
   p->started_picking = 1;
   p->checking_subchannel = 0;
   p->checking_connectivity = GRPC_CHANNEL_IDLE;
-  GRPC_LB_POLICY_REF(&p->base, "pick_first_connectivity");
+  GRPC_LB_POLICY_WEAK_REF(&p->base, "pick_first_connectivity");
   grpc_subchannel_notify_on_state_change(
       exec_ctx, p->subchannels[p->checking_subchannel],
-      &p->checking_connectivity, &p->connectivity_changed);
+      &p->base.interested_parties, &p->checking_connectivity,
+      &p->connectivity_changed);
 }
 
 void pf_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
@@ -174,8 +167,8 @@ void pf_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
 }
 
 int pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
-            grpc_metadata_batch *initial_metadata, grpc_subchannel **target,
+            grpc_metadata_batch *initial_metadata,
-            grpc_closure *on_complete) {
+            grpc_connected_subchannel **target, grpc_closure *on_complete) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
   pending_pick *pp;
   gpr_mu_lock(&p->mu);
@@ -187,8 +180,8 @@ int pf_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
     if (!p->started_picking) {
       start_picking(exec_ctx, p);
     }
-    grpc_subchannel_add_interested_party(
+    grpc_pollset_set_add_pollset(exec_ctx, &p->base.interested_parties,
-        exec_ctx, p->subchannels[p->checking_subchannel], pollset);
+                                 pollset);
     pp = gpr_malloc(sizeof(*pp));
     pp->next = p->pending_picks;
     pp->pollset = pollset;
@@ -204,25 +197,17 @@ static void destroy_subchannels(grpc_exec_ctx *exec_ctx, void *arg,
                                 int iomgr_success) {
   pick_first_lb_policy *p = arg;
   size_t i;
-  grpc_transport_op op;
   size_t num_subchannels = p->num_subchannels;
   grpc_subchannel **subchannels;
-  grpc_subchannel *exclude_subchannel;
 
   gpr_mu_lock(&p->mu);
   subchannels = p->subchannels;
   p->num_subchannels = 0;
   p->subchannels = NULL;
-  exclude_subchannel = p->selected;
   gpr_mu_unlock(&p->mu);
-  GRPC_LB_POLICY_UNREF(exec_ctx, &p->base, "destroy_subchannels");
+  GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &p->base, "destroy_subchannels");
 
   for (i = 0; i < num_subchannels; i++) {
-    if (subchannels[i] != exclude_subchannel) {
-      memset(&op, 0, sizeof(op));
-      op.disconnect = 1;
-      grpc_subchannel_process_transport_op(exec_ctx, subchannels[i], &op);
-    }
     GRPC_SUBCHANNEL_UNREF(exec_ctx, subchannels[i], "pick_first");
   }
 
@@ -232,23 +217,28 @@ static void destroy_subchannels(grpc_exec_ctx *exec_ctx, void *arg,
 static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
                                     int iomgr_success) {
   pick_first_lb_policy *p = arg;
+  grpc_subchannel *selected_subchannel;
   pending_pick *pp;
 
   gpr_mu_lock(&p->mu);
 
   if (p->shutdown) {
     gpr_mu_unlock(&p->mu);
-    GRPC_LB_POLICY_UNREF(exec_ctx, &p->base, "pick_first_connectivity");
+    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &p->base, "pick_first_connectivity");
     return;
   } else if (p->selected != NULL) {
+    if (p->checking_connectivity == GRPC_CHANNEL_TRANSIENT_FAILURE) {
+      /* if the selected channel goes bad, we're done */
+      p->checking_connectivity = GRPC_CHANNEL_FATAL_FAILURE;
+    }
     grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                 p->checking_connectivity, "selected_changed");
     if (p->checking_connectivity != GRPC_CHANNEL_FATAL_FAILURE) {
-      grpc_subchannel_notify_on_state_change(exec_ctx, p->selected,
+      grpc_connected_subchannel_notify_on_state_change(
-                                             &p->checking_connectivity,
+          exec_ctx, p->selected, &p->base.interested_parties,
-                                             &p->connectivity_changed);
+          &p->checking_connectivity, &p->connectivity_changed);
     } else {
-      GRPC_LB_POLICY_UNREF(exec_ctx, &p->base, "pick_first_connectivity");
+      GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &p->base, "pick_first_connectivity");
     }
   } else {
   loop:
@@ -256,39 +246,41 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
       case GRPC_CHANNEL_READY:
         grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                     GRPC_CHANNEL_READY, "connecting_ready");
-        p->selected = p->subchannels[p->checking_subchannel];
+        selected_subchannel = p->subchannels[p->checking_subchannel];
-        GRPC_SUBCHANNEL_REF(p->selected, "picked_first");
+        p->selected =
+            grpc_subchannel_get_connected_subchannel(selected_subchannel);
+        GPR_ASSERT(p->selected);
+        GRPC_CONNECTED_SUBCHANNEL_REF(p->selected, "picked_first");
         /* drop the pick list: we are connected now */
-        GRPC_LB_POLICY_REF(&p->base, "destroy_subchannels");
+        GRPC_LB_POLICY_WEAK_REF(&p->base, "destroy_subchannels");
         grpc_exec_ctx_enqueue(exec_ctx,
                               grpc_closure_create(destroy_subchannels, p), 1);
         /* update any calls that were waiting for a pick */
         while ((pp = p->pending_picks)) {
           p->pending_picks = pp->next;
           *pp->target = p->selected;
-          grpc_subchannel_del_interested_party(exec_ctx, p->selected,
+          grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
-                                               pp->pollset);
+                                       pp->pollset);
           grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
           gpr_free(pp);
         }
-        grpc_subchannel_notify_on_state_change(exec_ctx, p->selected,
+        grpc_connected_subchannel_notify_on_state_change(
-                                               &p->checking_connectivity,
+            exec_ctx, p->selected, &p->base.interested_parties,
-                                               &p->connectivity_changed);
+            &p->checking_connectivity, &p->connectivity_changed);
         break;
       case GRPC_CHANNEL_TRANSIENT_FAILURE:
         grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                     GRPC_CHANNEL_TRANSIENT_FAILURE,
                                     "connecting_transient_failure");
-        del_interested_parties_locked(exec_ctx, p);
         p->checking_subchannel =
             (p->checking_subchannel + 1) % p->num_subchannels;
         p->checking_connectivity = grpc_subchannel_check_connectivity(
             p->subchannels[p->checking_subchannel]);
-        add_interested_parties_locked(exec_ctx, p);
         if (p->checking_connectivity == GRPC_CHANNEL_TRANSIENT_FAILURE) {
           grpc_subchannel_notify_on_state_change(
               exec_ctx, p->subchannels[p->checking_subchannel],
-              &p->checking_connectivity, &p->connectivity_changed);
+              &p->base.interested_parties, &p->checking_connectivity,
+              &p->connectivity_changed);
         } else {
           goto loop;
         }
@@ -300,13 +292,13 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
                                     "connecting_changed");
         grpc_subchannel_notify_on_state_change(
             exec_ctx, p->subchannels[p->checking_subchannel],
-            &p->checking_connectivity, &p->connectivity_changed);
+            &p->base.interested_parties, &p->checking_connectivity,
+            &p->connectivity_changed);
         break;
       case GRPC_CHANNEL_FATAL_FAILURE:
-        del_interested_parties_locked(exec_ctx, p);
-        GPR_SWAP(grpc_subchannel *, p->subchannels[p->checking_subchannel],
-                 p->subchannels[p->num_subchannels - 1]);
         p->num_subchannels--;
+        GPR_SWAP(grpc_subchannel *, p->subchannels[p->checking_subchannel],
+                 p->subchannels[p->num_subchannels]);
         GRPC_SUBCHANNEL_UNREF(exec_ctx, p->subchannels[p->num_subchannels],
                               "pick_first");
         if (p->num_subchannels == 0) {
@@ -319,7 +311,8 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
             grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
             gpr_free(pp);
           }
-          GRPC_LB_POLICY_UNREF(exec_ctx, &p->base, "pick_first_connectivity");
+          GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &p->base,
+                                    "pick_first_connectivity");
         } else {
           grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                       GRPC_CHANNEL_TRANSIENT_FAILURE,
@@ -327,7 +320,6 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
           p->checking_subchannel %= p->num_subchannels;
           p->checking_connectivity = grpc_subchannel_check_connectivity(
               p->subchannels[p->checking_subchannel]);
-          add_interested_parties_locked(exec_ctx, p);
           goto loop;
         }
     }
@@ -336,39 +328,6 @@ static void pf_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
   gpr_mu_unlock(&p->mu);
 }
 
-static void pf_broadcast(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
-                         grpc_transport_op *op) {
-  pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
-  size_t i;
-  size_t n;
-  grpc_subchannel **subchannels;
-  grpc_subchannel *selected;
-
-  gpr_mu_lock(&p->mu);
-  n = p->num_subchannels;
-  subchannels = gpr_malloc(n * sizeof(*subchannels));
-  selected = p->selected;
-  if (selected) {
-    GRPC_SUBCHANNEL_REF(selected, "pf_broadcast_to_selected");
-  }
-  for (i = 0; i < n; i++) {
-    subchannels[i] = p->subchannels[i];
-    GRPC_SUBCHANNEL_REF(subchannels[i], "pf_broadcast");
-  }
-  gpr_mu_unlock(&p->mu);
-
-  for (i = 0; i < n; i++) {
-    if (selected == subchannels[i]) continue;
-    grpc_subchannel_process_transport_op(exec_ctx, subchannels[i], op);
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, subchannels[i], "pf_broadcast");
-  }
-  if (p->selected) {
-    grpc_subchannel_process_transport_op(exec_ctx, selected, op);
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, selected, "pf_broadcast_to_selected");
-  }
-  gpr_free(subchannels);
-}
-
 static grpc_connectivity_state pf_check_connectivity(grpc_exec_ctx *exec_ctx,
                                                      grpc_lb_policy *pol) {
   pick_first_lb_policy *p = (pick_first_lb_policy *)pol;
@@ -391,7 +350,7 @@ void pf_notify_on_state_change(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
 
 static const grpc_lb_policy_vtable pick_first_lb_policy_vtable = {
     pf_destroy, pf_shutdown, pf_pick, pf_cancel_pick, pf_ping_one, pf_exit_idle,
-    pf_broadcast, pf_check_connectivity, pf_notify_on_state_change};
+    pf_check_connectivity, pf_notify_on_state_change};
 
 static void pick_first_factory_ref(grpc_lb_policy_factory *factory) {}
 

src/core/client_config/lb_policies/round_robin.c

@@ -38,6 +38,8 @@
 #include <grpc/support/alloc.h>
 #include "src/core/transport/connectivity_state.h"
 
+typedef struct round_robin_lb_policy round_robin_lb_policy;
+
 int grpc_lb_round_robin_trace = 0;
 
 /** List of entities waiting for a pick.
@@ -46,7 +48,7 @@ int grpc_lb_round_robin_trace = 0;
 typedef struct pending_pick {
   struct pending_pick *next;
   grpc_pollset *pollset;
-  grpc_subchannel **target;
+  grpc_connected_subchannel **target;
   grpc_closure *on_complete;
 } pending_pick;
 
@@ -58,22 +60,27 @@ typedef struct ready_list {
 } ready_list;
 
 typedef struct {
-  size_t subchannel_idx; /**< Index over p->subchannels */
+  /** index within policy->subchannels */
-  void *p;               /**< round_robin_lb_policy instance */
+  size_t index;
-} connectivity_changed_cb_arg;
+  /** backpointer to owning policy */
-
+  round_robin_lb_policy *policy;
-typedef struct {
+  /** subchannel itself */
+  grpc_subchannel *subchannel;
+  /** notification that connectivity has changed on subchannel */
+  grpc_closure connectivity_changed_closure;
+  /** this subchannels current position in subchannel->ready_list */
+  ready_list *ready_list_node;
+  /** last observed connectivity */
+  grpc_connectivity_state connectivity_state;
+} subchannel_data;
+
+struct round_robin_lb_policy {
   /** base policy: must be first */
   grpc_lb_policy base;
 
   /** all our subchannels */
-  grpc_subchannel **subchannels;
   size_t num_subchannels;
-
+  subchannel_data **subchannels;
-  /** Callbacks, one per subchannel being watched, to be called when their
-   * respective connectivity changes */
-  grpc_closure *connectivity_changed_cbs;
-  connectivity_changed_cb_arg *cb_args;
 
   /** mutex protecting remaining members */
   gpr_mu mu;
@@ -81,8 +88,6 @@ typedef struct {
   int started_picking;
   /** are we shutting down? */
   int shutdown;
-  /** Connectivity state of the subchannels being watched */
-  grpc_connectivity_state *subchannel_connectivity;
   /** List of picks that are waiting on connectivity */
   pending_pick *pending_picks;
 
@@ -93,13 +98,7 @@ typedef struct {
   ready_list ready_list;
   /** Last pick from the ready list. */
   ready_list *ready_list_last_pick;
-
+};
-  /** Subchannel index to ready_list node.
-   *
-   * Kept in order to remove nodes from the ready list associated with a
-   * subchannel */
-  ready_list **subchannel_index_to_readylist_node;
-} round_robin_lb_policy;
 
 /** Returns the next subchannel from the connected list or NULL if the list is
  * empty.
@@ -144,9 +143,9 @@ static void advance_last_picked_locked(round_robin_lb_policy *p) {
 /** Prepends (relative to the root at p->ready_list) the connected subchannel \a
  * csc to the list of ready subchannels. */
 static ready_list *add_connected_sc_locked(round_robin_lb_policy *p,
-                                           grpc_subchannel *csc) {
+                                           grpc_subchannel *sc) {
   ready_list *new_elem = gpr_malloc(sizeof(ready_list));
-  new_elem->subchannel = csc;
+  new_elem->subchannel = sc;
   if (p->ready_list.prev == NULL) {
     /* first element */
     new_elem->next = &p->ready_list;
@@ -160,7 +159,7 @@ static ready_list *add_connected_sc_locked(round_robin_lb_policy *p,
     p->ready_list.prev = new_elem;
   }
   if (grpc_lb_round_robin_trace) {
-    gpr_log(GPR_DEBUG, "[READYLIST] ADDING NODE %p (SC %p)", new_elem, csc);
+    gpr_log(GPR_DEBUG, "[READYLIST] ADDING NODE %p (SC %p)", new_elem, sc);
   }
   return new_elem;
 }
@@ -200,28 +199,15 @@ static void remove_disconnected_sc_locked(round_robin_lb_policy *p,
   gpr_free(node);
 }
 
-static void del_interested_parties_locked(grpc_exec_ctx *exec_ctx,
-                                          round_robin_lb_policy *p,
-                                          const size_t subchannel_idx) {
-  pending_pick *pp;
-  for (pp = p->pending_picks; pp; pp = pp->next) {
-    grpc_subchannel_del_interested_party(
-        exec_ctx, p->subchannels[subchannel_idx], pp->pollset);
-  }
-}
-
 void rr_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   size_t i;
   ready_list *elem;
   for (i = 0; i < p->num_subchannels; i++) {
-    del_interested_parties_locked(exec_ctx, p, i);
+    subchannel_data *sd = p->subchannels[i];
+    GRPC_SUBCHANNEL_UNREF(exec_ctx, sd->subchannel, "round_robin");
+    gpr_free(sd);
   }
-  for (i = 0; i < p->num_subchannels; i++) {
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, p->subchannels[i], "round_robin");
-  }
-  gpr_free(p->connectivity_changed_cbs);
-  gpr_free(p->subchannel_connectivity);
 
   grpc_connectivity_state_destroy(exec_ctx, &p->state_tracker);
   gpr_free(p->subchannels);
@@ -237,20 +223,15 @@ void rr_destroy(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
     gpr_free(elem);
     elem = tmp;
   }
-  gpr_free(p->subchannel_index_to_readylist_node);
-  gpr_free(p->cb_args);
   gpr_free(p);
 }
 
 void rr_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
-  size_t i;
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   pending_pick *pp;
-  gpr_mu_lock(&p->mu);
+  size_t i;
 
-  for (i = 0; i < p->num_subchannels; i++) {
+  gpr_mu_lock(&p->mu);
-    del_interested_parties_locked(exec_ctx, p, i);
-  }
 
   p->shutdown = 1;
   while ((pp = p->pending_picks)) {
@@ -261,24 +242,26 @@ void rr_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
   }
   grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                               GRPC_CHANNEL_FATAL_FAILURE, "shutdown");
+  for (i = 0; i < p->num_subchannels; i++) {
+    subchannel_data *sd = p->subchannels[i];
+    grpc_subchannel_notify_on_state_change(exec_ctx, sd->subchannel, NULL, NULL,
+                                           &sd->connectivity_changed_closure);
+  }
   gpr_mu_unlock(&p->mu);
 }
 
 static void rr_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
-                           grpc_subchannel **target) {
+                           grpc_connected_subchannel **target) {
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   pending_pick *pp;
-  size_t i;
   gpr_mu_lock(&p->mu);
   pp = p->pending_picks;
   p->pending_picks = NULL;
   while (pp != NULL) {
     pending_pick *next = pp->next;
     if (pp->target == target) {
-      for (i = 0; i < p->num_subchannels; i++) {
+      grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
-        grpc_subchannel_add_interested_party(exec_ctx, p->subchannels[i],
+                                   pp->pollset);
-                                             pp->pollset);
-      }
       *target = NULL;
       grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 0);
       gpr_free(pp);
@@ -295,12 +278,16 @@ static void start_picking(grpc_exec_ctx *exec_ctx, round_robin_lb_policy *p) {
   size_t i;
   p->started_picking = 1;
 
+  gpr_log(GPR_DEBUG, "LB_POLICY: p=%p num_subchannels=%d", p,
+          p->num_subchannels);
+
   for (i = 0; i < p->num_subchannels; i++) {
-    p->subchannel_connectivity[i] = GRPC_CHANNEL_IDLE;
+    subchannel_data *sd = p->subchannels[i];
-    grpc_subchannel_notify_on_state_change(exec_ctx, p->subchannels[i],
+    sd->connectivity_state = GRPC_CHANNEL_IDLE;
-                                           &p->subchannel_connectivity[i],
+    grpc_subchannel_notify_on_state_change(
-                                           &p->connectivity_changed_cbs[i]);
+        exec_ctx, sd->subchannel, &p->base.interested_parties,
-    GRPC_LB_POLICY_REF(&p->base, "round_robin_connectivity");
+        &sd->connectivity_state, &sd->connectivity_changed_closure);
+    GRPC_LB_POLICY_WEAK_REF(&p->base, "round_robin_connectivity");
   }
 }
 
@@ -314,18 +301,18 @@ void rr_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol) {
 }
 
 int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
-            grpc_metadata_batch *initial_metadata, grpc_subchannel **target,
+            grpc_metadata_batch *initial_metadata,
-            grpc_closure *on_complete) {
+            grpc_connected_subchannel **target, grpc_closure *on_complete) {
-  size_t i;
   round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
   pending_pick *pp;
   ready_list *selected;
   gpr_mu_lock(&p->mu);
   if ((selected = peek_next_connected_locked(p))) {
     gpr_mu_unlock(&p->mu);
-    *target = selected->subchannel;
+    *target = grpc_subchannel_get_connected_subchannel(selected->subchannel);
     if (grpc_lb_round_robin_trace) {
-      gpr_log(GPR_DEBUG, "[RR PICK] TARGET <-- SUBCHANNEL %p (NODE %p)",
+      gpr_log(GPR_DEBUG,
+              "[RR PICK] TARGET <-- CONNECTED SUBCHANNEL %p (NODE %p)",
               selected->subchannel, selected);
     }
     /* only advance the last picked pointer if the selection was used */
@@ -335,10 +322,8 @@ int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
     if (!p->started_picking) {
       start_picking(exec_ctx, p);
     }
-    for (i = 0; i < p->num_subchannels; i++) {
+    grpc_pollset_set_add_pollset(exec_ctx, &p->base.interested_parties,
-      grpc_subchannel_add_interested_party(exec_ctx, p->subchannels[i],
+                                 pollset);
-                                           pollset);
-    }
     pp = gpr_malloc(sizeof(*pp));
     pp->next = p->pending_picks;
     pp->pollset = pollset;
@@ -352,33 +337,25 @@ int rr_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol, grpc_pollset *pollset,
 
 static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
                                     int iomgr_success) {
-  connectivity_changed_cb_arg *cb_arg = arg;
+  subchannel_data *sd = arg;
-  round_robin_lb_policy *p = cb_arg->p;
+  round_robin_lb_policy *p = sd->policy;
-  /* index over p->subchannels of this cb's subchannel */
-  const size_t this_idx = cb_arg->subchannel_idx;
   pending_pick *pp;
   ready_list *selected;
 
   int unref = 0;
 
-  /* connectivity state of this cb's subchannel */
-  grpc_connectivity_state *this_connectivity;
-
   gpr_mu_lock(&p->mu);
 
-  this_connectivity = &p->subchannel_connectivity[this_idx];
-
   if (p->shutdown) {
     unref = 1;
   } else {
-    switch (*this_connectivity) {
+    switch (sd->connectivity_state) {
       case GRPC_CHANNEL_READY:
         grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                     GRPC_CHANNEL_READY, "connecting_ready");
         /* add the newly connected subchannel to the list of connected ones.
          * Note that it goes to the "end of the line". */
-        p->subchannel_index_to_readylist_node[this_idx] =
+        sd->ready_list_node = add_connected_sc_locked(p, sd->subchannel);
-            add_connected_sc_locked(p, p->subchannels[this_idx]);
         /* at this point we know there's at least one suitable subchannel. Go
          * ahead and pick one and notify the pending suitors in
          * p->pending_picks. This preemtively replicates rr_pick()'s actions. */
@@ -390,60 +367,60 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
         }
         while ((pp = p->pending_picks)) {
           p->pending_picks = pp->next;
-          *pp->target = selected->subchannel;
+          *pp->target =
+              grpc_subchannel_get_connected_subchannel(selected->subchannel);
           if (grpc_lb_round_robin_trace) {
             gpr_log(GPR_DEBUG,
                     "[RR CONN CHANGED] TARGET <-- SUBCHANNEL %p (NODE %p)",
                     selected->subchannel, selected);
           }
-          grpc_subchannel_del_interested_party(exec_ctx, selected->subchannel,
+          grpc_pollset_set_del_pollset(exec_ctx, &p->base.interested_parties,
-                                               pp->pollset);
+                                       pp->pollset);
           grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
           gpr_free(pp);
         }
         grpc_subchannel_notify_on_state_change(
-            exec_ctx, p->subchannels[this_idx], this_connectivity,
+            exec_ctx, sd->subchannel, &p->base.interested_parties,
-            &p->connectivity_changed_cbs[this_idx]);
+            &sd->connectivity_state, &sd->connectivity_changed_closure);
         break;
       case GRPC_CHANNEL_CONNECTING:
       case GRPC_CHANNEL_IDLE:
         grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
-                                    *this_connectivity, "connecting_changed");
+                                    sd->connectivity_state,
+                                    "connecting_changed");
         grpc_subchannel_notify_on_state_change(
-            exec_ctx, p->subchannels[this_idx], this_connectivity,
+            exec_ctx, sd->subchannel, &p->base.interested_parties,
-            &p->connectivity_changed_cbs[this_idx]);
+            &sd->connectivity_state, &sd->connectivity_changed_closure);
         break;
       case GRPC_CHANNEL_TRANSIENT_FAILURE:
-        del_interested_parties_locked(exec_ctx, p, this_idx);
         /* renew state notification */
         grpc_subchannel_notify_on_state_change(
-            exec_ctx, p->subchannels[this_idx], this_connectivity,
+            exec_ctx, sd->subchannel, &p->base.interested_parties,
-            &p->connectivity_changed_cbs[this_idx]);
+            &sd->connectivity_state, &sd->connectivity_changed_closure);
 
         /* remove from ready list if still present */
-        if (p->subchannel_index_to_readylist_node[this_idx] != NULL) {
+        if (sd->ready_list_node != NULL) {
-          remove_disconnected_sc_locked(
+          remove_disconnected_sc_locked(p, sd->ready_list_node);
-              p, p->subchannel_index_to_readylist_node[this_idx]);
+          sd->ready_list_node = NULL;
-          p->subchannel_index_to_readylist_node[this_idx] = NULL;
         }
         grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                     GRPC_CHANNEL_TRANSIENT_FAILURE,
                                     "connecting_transient_failure");
         break;
       case GRPC_CHANNEL_FATAL_FAILURE:
-        del_interested_parties_locked(exec_ctx, p, this_idx);
+        if (sd->ready_list_node != NULL) {
-        if (p->subchannel_index_to_readylist_node[this_idx] != NULL) {
+          remove_disconnected_sc_locked(p, sd->ready_list_node);
-          remove_disconnected_sc_locked(
+          sd->ready_list_node = NULL;
-              p, p->subchannel_index_to_readylist_node[this_idx]);
-          p->subchannel_index_to_readylist_node[this_idx] = NULL;
         }
 
-        GPR_SWAP(grpc_subchannel *, p->subchannels[this_idx],
-                 p->subchannels[p->num_subchannels - 1]);
         p->num_subchannels--;
-        GRPC_SUBCHANNEL_UNREF(exec_ctx, p->subchannels[p->num_subchannels],
+        GPR_SWAP(subchannel_data *, p->subchannels[sd->index],
-                              "round_robin");
+                 p->subchannels[p->num_subchannels]);
+        GRPC_SUBCHANNEL_UNREF(exec_ctx, sd->subchannel, "round_robin");
+        p->subchannels[sd->index]->index = sd->index;
+        gpr_free(sd);
 
+        unref = 1;
         if (p->num_subchannels == 0) {
           grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                       GRPC_CHANNEL_FATAL_FAILURE,
@@ -454,7 +431,6 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
             grpc_exec_ctx_enqueue(exec_ctx, pp->on_complete, 1);
             gpr_free(pp);
           }
-          unref = 1;
         } else {
           grpc_connectivity_state_set(exec_ctx, &p->state_tracker,
                                       GRPC_CHANNEL_TRANSIENT_FAILURE,
@@ -466,31 +442,8 @@ static void rr_connectivity_changed(grpc_exec_ctx *exec_ctx, void *arg,
   gpr_mu_unlock(&p->mu);
 
   if (unref) {
-    GRPC_LB_POLICY_UNREF(exec_ctx, &p->base, "round_robin_connectivity");
+    GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, &p->base, "round_robin_connectivity");
-  }
-}
-
-static void rr_broadcast(grpc_exec_ctx *exec_ctx, grpc_lb_policy *pol,
-                         grpc_transport_op *op) {
-  round_robin_lb_policy *p = (round_robin_lb_policy *)pol;
-  size_t i;
-  size_t n;
-  grpc_subchannel **subchannels;
-
-  gpr_mu_lock(&p->mu);
-  n = p->num_subchannels;
-  subchannels = gpr_malloc(n * sizeof(*subchannels));
-  for (i = 0; i < n; i++) {
-    subchannels[i] = p->subchannels[i];
-    GRPC_SUBCHANNEL_REF(subchannels[i], "rr_broadcast");
   }
-  gpr_mu_unlock(&p->mu);
-
-  for (i = 0; i < n; i++) {
-    grpc_subchannel_process_transport_op(exec_ctx, subchannels[i], op);
-    GRPC_SUBCHANNEL_UNREF(exec_ctx, subchannels[i], "rr_broadcast");
-  }
-  gpr_free(subchannels);
 }
 
 static grpc_connectivity_state rr_check_connectivity(grpc_exec_ctx *exec_ctx,
@@ -516,7 +469,7 @@ static void rr_notify_on_state_change(grpc_exec_ctx *exec_ctx,
 
 static const grpc_lb_policy_vtable round_robin_lb_policy_vtable = {
     rr_destroy, rr_shutdown, rr_pick, rr_cancel_pick, rr_exit_idle,
-    rr_broadcast, rr_check_connectivity, rr_notify_on_state_change};
+    rr_check_connectivity, rr_notify_on_state_change};
 
 static void round_robin_factory_ref(grpc_lb_policy_factory *factory) {}
 
@@ -529,27 +482,22 @@ static grpc_lb_policy *create_round_robin(grpc_lb_policy_factory *factory,
   GPR_ASSERT(args->num_subchannels > 0);
   memset(p, 0, sizeof(*p));
   grpc_lb_policy_init(&p->base, &round_robin_lb_policy_vtable);
-  p->subchannels =
-      gpr_malloc(sizeof(grpc_subchannel *) * args->num_subchannels);
   p->num_subchannels = args->num_subchannels;
+  p->subchannels = gpr_malloc(sizeof(*p->subchannels) * p->num_subchannels);
+  memset(p->subchannels, 0, sizeof(*p->subchannels) * p->num_subchannels);
   grpc_connectivity_state_init(&p->state_tracker, GRPC_CHANNEL_IDLE,
                                "round_robin");
-  memcpy(p->subchannels, args->subchannels,
-         sizeof(grpc_subchannel *) * args->num_subchannels);
 
   gpr_mu_init(&p->mu);
-  p->connectivity_changed_cbs =
-      gpr_malloc(sizeof(grpc_closure) * args->num_subchannels);
-  p->subchannel_connectivity =
-      gpr_malloc(sizeof(grpc_connectivity_state) * args->num_subchannels);
-
-  p->cb_args =
-      gpr_malloc(sizeof(connectivity_changed_cb_arg) * args->num_subchannels);
   for (i = 0; i < args->num_subchannels; i++) {
-    p->cb_args[i].subchannel_idx = i;
+    subchannel_data *sd = gpr_malloc(sizeof(*sd));
-    p->cb_args[i].p = p;
+    memset(sd, 0, sizeof(*sd));
-    grpc_closure_init(&p->connectivity_changed_cbs[i], rr_connectivity_changed,
+    p->subchannels[i] = sd;
-                      &p->cb_args[i]);
+    sd->policy = p;
+    sd->index = i;
+    sd->subchannel = args->subchannels[i];
+    grpc_closure_init(&sd->connectivity_changed_closure,
+                      rr_connectivity_changed, sd);
   }
 
   /* The (dummy node) root of the ready list */
@@ -558,10 +506,6 @@ static grpc_lb_policy *create_round_robin(grpc_lb_policy_factory *factory,
   p->ready_list.next = NULL;
   p->ready_list_last_pick = &p->ready_list;
 
-  p->subchannel_index_to_readylist_node =
-      gpr_malloc(sizeof(grpc_subchannel *) * args->num_subchannels);
-  memset(p->subchannel_index_to_readylist_node, 0,
-         sizeof(grpc_subchannel *) * args->num_subchannels);
   return &p->base;
 }
 

src/core/client_config/lb_policy.c

@@ -33,59 +33,85 @@
 
 #include "src/core/client_config/lb_policy.h"
 
+#define WEAK_REF_BITS 16
+
 void grpc_lb_policy_init(grpc_lb_policy *policy,
                          const grpc_lb_policy_vtable *vtable) {
   policy->vtable = vtable;
-  gpr_ref_init(&policy->refs, 1);
+  gpr_atm_no_barrier_store(&policy->ref_pair, 1 << WEAK_REF_BITS);
+  grpc_pollset_set_init(&policy->interested_parties);
 }
 
 #ifdef GRPC_LB_POLICY_REFCOUNT_DEBUG
-void grpc_lb_policy_ref(grpc_lb_policy *policy, const char *file, int line,
+#define REF_FUNC_EXTRA_ARGS , const char *file, int line, const char *reason
-                        const char *reason) {
+#define REF_MUTATE_EXTRA_ARGS REF_FUNC_EXTRA_ARGS, const char *purpose
-  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "LB_POLICY:%p   ref %d -> %d %s",
+#define REF_FUNC_PASS_ARGS(new_reason) , file, line, new_reason
-          policy, (int)policy->refs.count, (int)policy->refs.count + 1, reason);
+#define REF_MUTATE_PASS_ARGS(purpose) , file, line, reason, purpose
 #else
-void grpc_lb_policy_ref(grpc_lb_policy *policy) {
+#define REF_FUNC_EXTRA_ARGS
+#define REF_MUTATE_EXTRA_ARGS
+#define REF_FUNC_PASS_ARGS(new_reason)
+#define REF_MUTATE_PASS_ARGS(x)
 #endif
-  gpr_ref(&policy->refs);
-}
 
+static gpr_atm ref_mutate(grpc_lb_policy *c, gpr_atm delta,
+                          int barrier REF_MUTATE_EXTRA_ARGS) {
+  gpr_atm old_val = barrier ? gpr_atm_full_fetch_add(&c->ref_pair, delta)
+                            : gpr_atm_no_barrier_fetch_add(&c->ref_pair, delta);
 #ifdef GRPC_LB_POLICY_REFCOUNT_DEBUG
-void grpc_lb_policy_unref(grpc_lb_policy *policy,
+  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
-                          grpc_closure_list *closure_list, const char *file,
+          "LB_POLICY: %p % 12s 0x%08x -> 0x%08x [%s]", c, purpose, old_val,
-                          int line, const char *reason) {
+          old_val + delta, reason);
-  gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG, "LB_POLICY:%p unref %d -> %d %s",
-          policy, (int)policy->refs.count, (int)policy->refs.count - 1, reason);
-#else
-void grpc_lb_policy_unref(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy) {
 #endif
-  if (gpr_unref(&policy->refs)) {
+  return old_val;
-    policy->vtable->destroy(exec_ctx, policy);
+}
+
+void grpc_lb_policy_ref(grpc_lb_policy *policy REF_FUNC_EXTRA_ARGS) {
+  ref_mutate(policy, 1 << WEAK_REF_BITS, 0 REF_MUTATE_PASS_ARGS("STRONG_REF"));
+}
+
+void grpc_lb_policy_unref(grpc_exec_ctx *exec_ctx,
+                          grpc_lb_policy *policy REF_FUNC_EXTRA_ARGS) {
+  gpr_atm old_val =
+      ref_mutate(policy, (gpr_atm)1 - (gpr_atm)(1 << WEAK_REF_BITS),
+                 1 REF_MUTATE_PASS_ARGS("STRONG_UNREF"));
+  gpr_atm mask = ~(gpr_atm)((1 << WEAK_REF_BITS) - 1);
+  gpr_atm check = 1 << WEAK_REF_BITS;
+  if ((old_val & mask) == check) {
+    policy->vtable->shutdown(exec_ctx, policy);
   }
+  grpc_lb_policy_weak_unref(exec_ctx,
+                            policy REF_FUNC_PASS_ARGS("strong-unref"));
 }
 
-void grpc_lb_policy_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy) {
+void grpc_lb_policy_weak_ref(grpc_lb_policy *policy REF_FUNC_EXTRA_ARGS) {
-  policy->vtable->shutdown(exec_ctx, policy);
+  ref_mutate(policy, 1, 0 REF_MUTATE_PASS_ARGS("WEAK_REF"));
+}
+
+void grpc_lb_policy_weak_unref(grpc_exec_ctx *exec_ctx,
+                               grpc_lb_policy *policy REF_FUNC_EXTRA_ARGS) {
+  gpr_atm old_val =
+      ref_mutate(policy, -(gpr_atm)1, 1 REF_MUTATE_PASS_ARGS("WEAK_UNREF"));
+  if (old_val == 1) {
+    grpc_pollset_set_destroy(&policy->interested_parties);
+    policy->vtable->destroy(exec_ctx, policy);
+  }
 }
 
 int grpc_lb_policy_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
                         grpc_pollset *pollset,
                         grpc_metadata_batch *initial_metadata,
-                        grpc_subchannel **target, grpc_closure *on_complete) {
+                        grpc_connected_subchannel **target,
+                        grpc_closure *on_complete) {
   return policy->vtable->pick(exec_ctx, policy, pollset, initial_metadata,
                               target, on_complete);
 }
 
 void grpc_lb_policy_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
-                                grpc_subchannel **target) {
+                                grpc_connected_subchannel **target) {
   policy->vtable->cancel_pick(exec_ctx, policy, target);
 }
 
-void grpc_lb_policy_broadcast(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
-                              grpc_transport_op *op) {
-  policy->vtable->broadcast(exec_ctx, policy, op);
-}
-
 void grpc_lb_policy_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy) {
   policy->vtable->exit_idle(exec_ctx, policy);
 }

src/core/client_config/lb_policy.h

@@ -47,7 +47,8 @@ typedef void (*grpc_lb_completion)(void *cb_arg, grpc_subchannel *subchannel,
 
 struct grpc_lb_policy {
   const grpc_lb_policy_vtable *vtable;
-  gpr_refcount refs;
+  gpr_atm ref_pair;
+  grpc_pollset_set interested_parties;
 };
 
 struct grpc_lb_policy_vtable {
@@ -58,19 +59,15 @@ struct grpc_lb_policy_vtable {
   /** implement grpc_lb_policy_pick */
   int (*pick)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
               grpc_pollset *pollset, grpc_metadata_batch *initial_metadata,
-              grpc_subchannel **target, grpc_closure *on_complete);
+              grpc_connected_subchannel **target, grpc_closure *on_complete);
   void (*cancel_pick)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
-                      grpc_subchannel **target);
+                      grpc_connected_subchannel **target);
 
   void (*ping_one)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy, grpc_pollset *pollset, grpc_closure *closure);
 
   /** try to enter a READY connectivity state */
   void (*exit_idle)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
 
-  /** broadcast a transport op to all subchannels */
-  void (*broadcast)(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
-                    grpc_transport_op *op);
-
   /** check the current connectivity of the lb_policy */
   grpc_connectivity_state (*check_connectivity)(grpc_exec_ctx *exec_ctx,
                                                 grpc_lb_policy *policy);
@@ -83,29 +80,39 @@ struct grpc_lb_policy_vtable {
                                  grpc_closure *closure);
 };
 
+/*#define GRPC_LB_POLICY_REFCOUNT_DEBUG*/
 #ifdef GRPC_LB_POLICY_REFCOUNT_DEBUG
 #define GRPC_LB_POLICY_REF(p, r) \
   grpc_lb_policy_ref((p), __FILE__, __LINE__, (r))
 #define GRPC_LB_POLICY_UNREF(exec_ctx, p, r) \
   grpc_lb_policy_unref((exec_ctx), (p), __FILE__, __LINE__, (r))
+#define GRPC_LB_POLICY_WEAK_REF(p, r) \
+  grpc_lb_policy_weak_ref((p), __FILE__, __LINE__, (r))
+#define GRPC_LB_POLICY_WEAK_UNREF(exec_ctx, p, r) \
+  grpc_lb_policy_weak_unref((exec_ctx), (p), __FILE__, __LINE__, (r))
 void grpc_lb_policy_ref(grpc_lb_policy *policy, const char *file, int line,
                         const char *reason);
 void grpc_lb_policy_unref(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
                           const char *file, int line, const char *reason);
+void grpc_lb_policy_weak_ref(grpc_lb_policy *policy, const char *file, int line,
+                             const char *reason);
+void grpc_lb_policy_weak_unref(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
+                               const char *file, int line, const char *reason);
 #else
 #define GRPC_LB_POLICY_REF(p, r) grpc_lb_policy_ref((p))
 #define GRPC_LB_POLICY_UNREF(cl, p, r) grpc_lb_policy_unref((cl), (p))
+#define GRPC_LB_POLICY_WEAK_REF(p, r) grpc_lb_policy_weak_ref((p))
+#define GRPC_LB_POLICY_WEAK_UNREF(cl, p, r) grpc_lb_policy_weak_unref((cl), (p))
 void grpc_lb_policy_ref(grpc_lb_policy *policy);
 void grpc_lb_policy_unref(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
+void grpc_lb_policy_weak_ref(grpc_lb_policy *policy);
+void grpc_lb_policy_weak_unref(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
 #endif
 
 /** called by concrete implementations to initialize the base struct */
 void grpc_lb_policy_init(grpc_lb_policy *policy,
                          const grpc_lb_policy_vtable *vtable);
 
-/** Start shutting down (fail any pending picks) */
-void grpc_lb_policy_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
-
 /** Given initial metadata in \a initial_metadata, find an appropriate
     target for this rpc, and 'return' it by calling \a on_complete after setting
     \a target.
@@ -113,15 +120,13 @@ void grpc_lb_policy_shutdown(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
 int grpc_lb_policy_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
                         grpc_pollset *pollset,
                         grpc_metadata_batch *initial_metadata,
-                        grpc_subchannel **target, grpc_closure *on_complete);
+                        grpc_connected_subchannel **target,
+                        grpc_closure *on_complete);
 
 void grpc_lb_policy_ping_one(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy, grpc_pollset *pollset, grpc_closure *closure);
 
 void grpc_lb_policy_cancel_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
-                                grpc_subchannel **target);
+                                grpc_connected_subchannel **target);
-
-void grpc_lb_policy_broadcast(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
-                              grpc_transport_op *op);
 
 void grpc_lb_policy_exit_idle(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy);
 

src/core/client_config/resolver.c

@@ -71,11 +71,8 @@ void grpc_resolver_shutdown(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver) {
 }
 
 void grpc_resolver_channel_saw_error(grpc_exec_ctx *exec_ctx,
-                                     grpc_resolver *resolver,
+                                     grpc_resolver *resolver) {
-                                     struct sockaddr *failing_address,
+  resolver->vtable->channel_saw_error(exec_ctx, resolver);
-                                     int failing_address_len) {
-  resolver->vtable->channel_saw_error(exec_ctx, resolver, failing_address,
-                                      failing_address_len);
 }
 
 void grpc_resolver_next(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver,

src/core/client_config/resolver.h

@@ -35,8 +35,8 @@
 #define GRPC_INTERNAL_CORE_CLIENT_CONFIG_RESOLVER_H
 
 #include "src/core/client_config/client_config.h"
+#include "src/core/client_config/subchannel.h"
 #include "src/core/iomgr/iomgr.h"
-#include "src/core/iomgr/sockaddr.h"
 
 typedef struct grpc_resolver grpc_resolver;
 typedef struct grpc_resolver_vtable grpc_resolver_vtable;
@@ -51,9 +51,7 @@ struct grpc_resolver {
 struct grpc_resolver_vtable {
   void (*destroy)(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver);
   void (*shutdown)(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver);
-  void (*channel_saw_error)(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver,
+  void (*channel_saw_error)(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver);
-                            struct sockaddr *failing_address,
-                            int failing_address_len);
   void (*next)(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver,
                grpc_client_config **target_config, grpc_closure *on_complete);
 };
@@ -81,9 +79,7 @@ void grpc_resolver_shutdown(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver);
 /** Notification that the channel has seen an error on some address.
     Can be used as a hint that re-resolution is desirable soon. */
 void grpc_resolver_channel_saw_error(grpc_exec_ctx *exec_ctx,
-                                     grpc_resolver *resolver,
+                                     grpc_resolver *resolver);
-                                     struct sockaddr *failing_address,
-                                     int failing_address_len);
 
 /** Get the next client config. Called by the channel to fetch a new
     configuration. Expected to set *target_config with a new configuration,

src/core/client_config/resolvers/dns_resolver.c

@@ -81,9 +81,7 @@ static void dns_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
                                          dns_resolver *r);
 
 static void dns_shutdown(grpc_exec_ctx *exec_ctx, grpc_resolver *r);
-static void dns_channel_saw_error(grpc_exec_ctx *exec_ctx, grpc_resolver *r,
+static void dns_channel_saw_error(grpc_exec_ctx *exec_ctx, grpc_resolver *r);
-                                  struct sockaddr *failing_address,
-                                  int failing_address_len);
 static void dns_next(grpc_exec_ctx *exec_ctx, grpc_resolver *r,
                      grpc_client_config **target_config,
                      grpc_closure *on_complete);
@@ -103,8 +101,7 @@ static void dns_shutdown(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver) {
 }
 
 static void dns_channel_saw_error(grpc_exec_ctx *exec_ctx,
-                                  grpc_resolver *resolver, struct sockaddr *sa,
+                                  grpc_resolver *resolver) {
-                                  int len) {
   dns_resolver *r = (dns_resolver *)resolver;
   gpr_mu_lock(&r->mu);
   if (!r->resolving) {

src/core/client_config/resolvers/sockaddr_resolver.c

@@ -83,9 +83,7 @@ static void sockaddr_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
 
 static void sockaddr_shutdown(grpc_exec_ctx *exec_ctx, grpc_resolver *r);
 static void sockaddr_channel_saw_error(grpc_exec_ctx *exec_ctx,
-                                       grpc_resolver *r,
+                                       grpc_resolver *r);
-                                       struct sockaddr *failing_address,
-                                       int failing_address_len);
 static void sockaddr_next(grpc_exec_ctx *exec_ctx, grpc_resolver *r,
                           grpc_client_config **target_config,
                           grpc_closure *on_complete);
@@ -107,8 +105,13 @@ static void sockaddr_shutdown(grpc_exec_ctx *exec_ctx,
 }
 
 static void sockaddr_channel_saw_error(grpc_exec_ctx *exec_ctx,
-                                       grpc_resolver *resolver,
+                                       grpc_resolver *resolver) {
-                                       struct sockaddr *sa, int len) {}
+  sockaddr_resolver *r = (sockaddr_resolver *)resolver;
+  gpr_mu_lock(&r->mu);
+  r->published = 0;
+  sockaddr_maybe_finish_next_locked(exec_ctx, r);
+  gpr_mu_unlock(&r->mu);
+}
 
 static void sockaddr_next(grpc_exec_ctx *exec_ctx, grpc_resolver *resolver,
                           grpc_client_config **target_config,

src/core/client_config/resolvers/zookeeper_resolver.c

@@ -96,9 +96,7 @@ static void zookeeper_maybe_finish_next_locked(grpc_exec_ctx *exec_ctx,
 
 static void zookeeper_shutdown(grpc_exec_ctx *exec_ctx, grpc_resolver *r);
 static void zookeeper_channel_saw_error(grpc_exec_ctx *exec_ctx,
-                                        grpc_resolver *r,
+                                        grpc_resolver *r);
-                                        struct sockaddr *failing_address,
-                                        int failing_address_len);
 static void zookeeper_next(grpc_exec_ctx *exec_ctx, grpc_resolver *r,
                            grpc_client_config **target_config,
                            grpc_closure *on_complete);
@@ -125,8 +123,7 @@ static void zookeeper_shutdown(grpc_exec_ctx *exec_ctx,
 }
 
 static void zookeeper_channel_saw_error(grpc_exec_ctx *exec_ctx,
-                                        grpc_resolver *resolver,
+                                        grpc_resolver *resolver) {
-                                        struct sockaddr *sa, int len) {
   zookeeper_resolver *r = (zookeeper_resolver *)resolver;
   gpr_mu_lock(&r->mu);
   if (r->resolving == 0) {

src/core/client_config/subchannel.h

@@ -41,6 +41,7 @@
 /** A (sub-)channel that knows how to connect to exactly one target
     address. Provides a target for load balancing. */
 typedef struct grpc_subchannel grpc_subchannel;
+typedef struct grpc_connected_subchannel grpc_connected_subchannel;
 typedef struct grpc_subchannel_call grpc_subchannel_call;
 typedef struct grpc_subchannel_args grpc_subchannel_args;
 
@@ -49,6 +50,14 @@ typedef struct grpc_subchannel_args grpc_subchannel_args;
   grpc_subchannel_ref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_UNREF(cl, p, r) \
   grpc_subchannel_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_SUBCHANNEL_WEAK_REF(p, r) \
+  grpc_subchannel_weak_ref((p), __FILE__, __LINE__, (r))
+#define GRPC_SUBCHANNEL_WEAK_UNREF(cl, p, r) \
+  grpc_subchannel_weak_unref((cl), (p), __FILE__, __LINE__, (r))
+#define GRPC_CONNECTED_SUBCHANNEL_REF(p, r) \
+  grpc_connected_subchannel_ref((p), __FILE__, __LINE__, (r))
+#define GRPC_CONNECTED_SUBCHANNEL_UNREF(cl, p, r) \
+  grpc_connected_subchannel_unref((cl), (p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_CALL_REF(p, r) \
   grpc_subchannel_call_ref((p), __FILE__, __LINE__, (r))
 #define GRPC_SUBCHANNEL_CALL_UNREF(cl, p, r) \
@@ -58,6 +67,12 @@ typedef struct grpc_subchannel_args grpc_subchannel_args;
 #else
 #define GRPC_SUBCHANNEL_REF(p, r) grpc_subchannel_ref((p))
 #define GRPC_SUBCHANNEL_UNREF(cl, p, r) grpc_subchannel_unref((cl), (p))
+#define GRPC_SUBCHANNEL_WEAK_REF(p, r) grpc_subchannel_weak_ref((p))
+#define GRPC_SUBCHANNEL_WEAK_UNREF(cl, p, r) \
+  grpc_subchannel_weak_unref((cl), (p))
+#define GRPC_CONNECTED_SUBCHANNEL_REF(p, r) grpc_connected_subchannel_ref((p))
+#define GRPC_CONNECTED_SUBCHANNEL_UNREF(cl, p, r) \
+  grpc_connected_subchannel_unref((cl), (p))
 #define GRPC_SUBCHANNEL_CALL_REF(p, r) grpc_subchannel_call_ref((p))
 #define GRPC_SUBCHANNEL_CALL_UNREF(cl, p, r) \
   grpc_subchannel_call_unref((cl), (p))
@@ -69,33 +84,31 @@ void grpc_subchannel_ref(grpc_subchannel *channel
 void grpc_subchannel_unref(grpc_exec_ctx *exec_ctx,
                            grpc_subchannel *channel
                                GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_subchannel_weak_ref(grpc_subchannel *channel
+                                  GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_subchannel_weak_unref(grpc_exec_ctx *exec_ctx,
+                                grpc_subchannel *channel
+                                    GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_connected_subchannel_ref(grpc_connected_subchannel *channel
+                                       GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
+void grpc_connected_subchannel_unref(grpc_exec_ctx *exec_ctx,
+                                     grpc_connected_subchannel *channel
+                                         GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 void grpc_subchannel_call_ref(grpc_subchannel_call *call
                                   GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 void grpc_subchannel_call_unref(grpc_exec_ctx *exec_ctx,
                                 grpc_subchannel_call *call
                                     GRPC_SUBCHANNEL_REF_EXTRA_ARGS);
 
-/** construct a subchannel call (possibly asynchronously).
+/** construct a subchannel call */
- *
+grpc_subchannel_call *grpc_connected_subchannel_create_call(
- * If the returned status is 1, the call will return immediately and \a target
+    grpc_exec_ctx *exec_ctx, grpc_connected_subchannel *connected_subchannel,
- * will point to a connected \a subchannel_call instance. Note that \a notify
+    grpc_pollset *pollset);
- * will \em not be invoked in this case.
- * Otherwise, if the returned status is 0, the subchannel call will be created
- * asynchronously, invoking the \a notify callback upon completion. */
-int grpc_subchannel_create_call(grpc_exec_ctx *exec_ctx,
-                                grpc_subchannel *subchannel,
-                                grpc_pollset *pollset, gpr_atm *target,
-                                grpc_closure *notify);
-
-/** cancel \a call in the waiting state. */
-void grpc_subchannel_cancel_create_call(grpc_exec_ctx *exec_ctx,
-                                        grpc_subchannel *subchannel,
-                                        gpr_atm *target);
 
 /** process a transport level op */
-void grpc_subchannel_process_transport_op(grpc_exec_ctx *exec_ctx,
+void grpc_connected_subchannel_process_transport_op(
-                                          grpc_subchannel *subchannel,
+    grpc_exec_ctx *exec_ctx, grpc_connected_subchannel *subchannel,
-                                          grpc_transport_op *op);
+    grpc_transport_op *op);
 
 /** poll the current connectivity state of a channel */
 grpc_connectivity_state grpc_subchannel_check_connectivity(
@@ -103,26 +116,19 @@ grpc_connectivity_state grpc_subchannel_check_connectivity(
 
 /** call notify when the connectivity state of a channel changes from *state.
     Updates *state with the new state of the channel */
-void grpc_subchannel_notify_on_state_change(grpc_exec_ctx *exec_ctx,
+void grpc_subchannel_notify_on_state_change(
-                                            grpc_subchannel *channel,
+    grpc_exec_ctx *exec_ctx, grpc_subchannel *channel,
-                                            grpc_connectivity_state *state,
+    grpc_pollset_set *interested_parties, grpc_connectivity_state *state,
-                                            grpc_closure *notify);
+    grpc_closure *notify);
-
+void grpc_connected_subchannel_notify_on_state_change(
-/** Remove \a subscribed_notify from the list of closures to be called on a
+    grpc_exec_ctx *exec_ctx, grpc_connected_subchannel *channel,
- * state change if present, returning 1. Otherwise, nothing is done and return
+    grpc_pollset_set *interested_parties, grpc_connectivity_state *state,
- * 0. */
+    grpc_closure *notify);
-int grpc_subchannel_state_change_unsubscribe(grpc_exec_ctx *exec_ctx,
+
-                                             grpc_subchannel *channel,
+/** retrieve the grpc_connected_subchannel - or NULL if called before
-                                             grpc_closure *subscribed_notify);
+    the subchannel becomes connected */
-
+grpc_connected_subchannel *grpc_subchannel_get_connected_subchannel(
-/** express interest in \a channel's activities through \a pollset. */
+    grpc_subchannel *subchannel);
-void grpc_subchannel_add_interested_party(grpc_exec_ctx *exec_ctx,
-                                          grpc_subchannel *channel,
-                                          grpc_pollset *pollset);
-/** stop following \a channel's activity through \a pollset. */
-void grpc_subchannel_del_interested_party(grpc_exec_ctx *exec_ctx,
-                                          grpc_subchannel *channel,
-                                          grpc_pollset *pollset);
 
 /** continue processing a transport op */
 void grpc_subchannel_call_process_op(grpc_exec_ctx *exec_ctx,
@@ -147,15 +153,10 @@ struct grpc_subchannel_args {
   /** Address to connect to */
   struct sockaddr *addr;
   size_t addr_len;
-  /** master channel */
-  grpc_channel *master;
 };
 
 /** create a subchannel given a connector */
 grpc_subchannel *grpc_subchannel_create(grpc_connector *connector,
                                         grpc_subchannel_args *args);
 
-/** Return the master channel associated with the subchannel */
-grpc_channel *grpc_subchannel_get_master(grpc_subchannel *subchannel);
-
 #endif /* GRPC_INTERNAL_CORE_CLIENT_CONFIG_SUBCHANNEL_H */

src/core/iomgr/fd_posix.c

@@ -43,6 +43,7 @@
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
 #define CLOSURE_NOT_READY ((grpc_closure *)0)
@@ -158,7 +159,10 @@ void grpc_fd_global_shutdown(void) {
 
 grpc_fd *grpc_fd_create(int fd, const char *name) {
   grpc_fd *r = alloc_fd(fd);
-  grpc_iomgr_register_object(&r->iomgr_object, name);
+  char *name2;
+  gpr_asprintf(&name2, "%s fd=%d", name, fd);
+  grpc_iomgr_register_object(&r->iomgr_object, name2);
+  gpr_free(name2);
 #ifdef GRPC_FD_REF_COUNT_DEBUG
   gpr_log(GPR_DEBUG, "FD %d %p create %s", fd, r, name);
 #endif

src/core/iomgr/fd_posix.h

@@ -170,6 +170,7 @@ void grpc_fd_become_readable(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
 void grpc_fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd);
 
 /* Reference counting for fds */
+/*#define GRPC_FD_REF_COUNT_DEBUG*/
 #ifdef GRPC_FD_REF_COUNT_DEBUG
 void grpc_fd_ref(grpc_fd *fd, const char *reason, const char *file, int line);
 void grpc_fd_unref(grpc_fd *fd, const char *reason, const char *file, int line);

src/core/iomgr/pollset_set.h

@@ -49,13 +49,19 @@
 #include "src/core/iomgr/pollset_set_windows.h"
 #endif
 
-void grpc_pollset_set_init(grpc_pollset_set* pollset_set);
+void grpc_pollset_set_init(grpc_pollset_set *pollset_set);
-void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set);
+void grpc_pollset_set_destroy(grpc_pollset_set *pollset_set);
-void grpc_pollset_set_add_pollset(grpc_exec_ctx* exec_ctx,
+void grpc_pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+                                  grpc_pollset_set *pollset_set,
-                                  grpc_pollset* pollset);
+                                  grpc_pollset *pollset);
-void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
+void grpc_pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
-                                  grpc_pollset_set* pollset_set,
+                                  grpc_pollset_set *pollset_set,
-                                  grpc_pollset* pollset);
+                                  grpc_pollset *pollset);
+void grpc_pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
+                                      grpc_pollset_set *bag,
+                                      grpc_pollset_set *item);
+void grpc_pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
+                                      grpc_pollset_set *bag,
+                                      grpc_pollset_set *item);
 
 #endif /* GRPC_INTERNAL_CORE_IOMGR_POLLSET_H */

src/core/iomgr/pollset_set_posix.c

@@ -52,9 +52,10 @@ void grpc_pollset_set_destroy(grpc_pollset_set *pollset_set) {
   size_t i;
   gpr_mu_destroy(&pollset_set->mu);
   for (i = 0; i < pollset_set->fd_count; i++) {
-    GRPC_FD_UNREF(pollset_set->fds[i], "pollset");
+    GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
   }
   gpr_free(pollset_set->pollsets);
+  gpr_free(pollset_set->pollset_sets);
   gpr_free(pollset_set->fds);
 }
 
@@ -73,7 +74,7 @@ void grpc_pollset_set_add_pollset(grpc_exec_ctx *exec_ctx,
   pollset_set->pollsets[pollset_set->pollset_count++] = pollset;
   for (i = 0, j = 0; i < pollset_set->fd_count; i++) {
     if (grpc_fd_is_orphaned(pollset_set->fds[i])) {
-      GRPC_FD_UNREF(pollset_set->fds[i], "pollset");
+      GRPC_FD_UNREF(pollset_set->fds[i], "pollset_set");
     } else {
       grpc_pollset_add_fd(exec_ctx, pollset, pollset_set->fds[i]);
       pollset_set->fds[j++] = pollset_set->fds[i];
@@ -99,6 +100,46 @@ void grpc_pollset_set_del_pollset(grpc_exec_ctx *exec_ctx,
   gpr_mu_unlock(&pollset_set->mu);
 }
 
+void grpc_pollset_set_add_pollset_set(grpc_exec_ctx *exec_ctx,
+                                      grpc_pollset_set *bag,
+                                      grpc_pollset_set *item) {
+  size_t i, j;
+  gpr_mu_lock(&bag->mu);
+  if (bag->pollset_set_count == bag->pollset_set_capacity) {
+    bag->pollset_set_capacity = GPR_MAX(8, 2 * bag->pollset_set_capacity);
+    bag->pollset_sets =
+        gpr_realloc(bag->pollset_sets,
+                    bag->pollset_set_capacity * sizeof(*bag->pollset_sets));
+  }
+  bag->pollset_sets[bag->pollset_set_count++] = item;
+  for (i = 0, j = 0; i < bag->fd_count; i++) {
+    if (grpc_fd_is_orphaned(bag->fds[i])) {
+      GRPC_FD_UNREF(bag->fds[i], "pollset_set");
+    } else {
+      grpc_pollset_set_add_fd(exec_ctx, item, bag->fds[i]);
+      bag->fds[j++] = bag->fds[i];
+    }
+  }
+  bag->fd_count = j;
+  gpr_mu_unlock(&bag->mu);
+}
+
+void grpc_pollset_set_del_pollset_set(grpc_exec_ctx *exec_ctx,
+                                      grpc_pollset_set *bag,
+                                      grpc_pollset_set *item) {
+  size_t i;
+  gpr_mu_lock(&bag->mu);
+  for (i = 0; i < bag->pollset_set_count; i++) {
+    if (bag->pollset_sets[i] == item) {
+      bag->pollset_set_count--;
+      GPR_SWAP(grpc_pollset_set *, bag->pollset_sets[i],
+               bag->pollset_sets[bag->pollset_set_count]);
+      break;
+    }
+  }
+  gpr_mu_unlock(&bag->mu);
+}
+
 void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
                              grpc_pollset_set *pollset_set, grpc_fd *fd) {
   size_t i;
@@ -113,6 +154,9 @@ void grpc_pollset_set_add_fd(grpc_exec_ctx *exec_ctx,
   for (i = 0; i < pollset_set->pollset_count; i++) {
     grpc_pollset_add_fd(exec_ctx, pollset_set->pollsets[i], fd);
   }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    grpc_pollset_set_add_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
   gpr_mu_unlock(&pollset_set->mu);
 }
 
@@ -129,6 +173,9 @@ void grpc_pollset_set_del_fd(grpc_exec_ctx *exec_ctx,
       break;
     }
   }
+  for (i = 0; i < pollset_set->pollset_set_count; i++) {
+    grpc_pollset_set_del_fd(exec_ctx, pollset_set->pollset_sets[i], fd);
+  }
   gpr_mu_unlock(&pollset_set->mu);
 }
 

src/core/iomgr/pollset_set_posix.h

@@ -44,6 +44,10 @@ typedef struct grpc_pollset_set {
   size_t pollset_capacity;
   grpc_pollset **pollsets;
 
+  size_t pollset_set_count;
+  size_t pollset_set_capacity;
+  struct grpc_pollset_set **pollset_sets;
+
   size_t fd_count;
   size_t fd_capacity;
   grpc_fd **fds;

src/core/iomgr/pollset_set_windows.c

@@ -49,4 +49,12 @@ void grpc_pollset_set_del_pollset(grpc_exec_ctx* exec_ctx,
                                   grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {}
 
+void grpc_pollset_set_add_pollset_set(grpc_exec_ctx* exec_ctx,
+                                      grpc_pollset_set* bag,
+                                      grpc_pollset_set* item) {}
+
+void grpc_pollset_set_del_pollset_set(grpc_exec_ctx* exec_ctx,
+                                      grpc_pollset_set* bag,
+                                      grpc_pollset_set* item) {}
+
 #endif /* GPR_WINSOCK_SOCKET */

src/core/security/credentials.c

@@ -39,7 +39,7 @@
 #include "src/core/channel/channel_args.h"
 #include "src/core/channel/http_client_filter.h"
 #include "src/core/httpcli/httpcli.h"
-#include "src/core/iomgr/iomgr.h"
+#include "src/core/iomgr/executor.h"
 #include "src/core/json/json.h"
 #include "src/core/support/string.h"
 #include "src/core/surface/api_trace.h"
@@ -48,7 +48,6 @@
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/sync.h>
-#include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 
 /* -- Common. -- */
@@ -792,15 +791,14 @@ static void md_only_test_destruct(grpc_call_credentials *creds) {
   grpc_credentials_md_store_unref(c->md_store);
 }
 
-static void on_simulated_token_fetch_done(void *user_data) {
+static void on_simulated_token_fetch_done(grpc_exec_ctx *exec_ctx,
+                                          void *user_data, int success) {
   grpc_credentials_metadata_request *r =
       (grpc_credentials_metadata_request *)user_data;
   grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)r->creds;
-  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  r->cb(exec_ctx, r->user_data, c->md_store->entries, c->md_store->num_entries,
-  r->cb(&exec_ctx, r->user_data, c->md_store->entries, c->md_store->num_entries,
         GRPC_CREDENTIALS_OK);
   grpc_credentials_metadata_request_destroy(r);
-  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 static void md_only_test_get_request_metadata(
@@ -810,10 +808,10 @@ static void md_only_test_get_request_metadata(
   grpc_md_only_test_credentials *c = (grpc_md_only_test_credentials *)creds;
 
   if (c->is_async) {
-    gpr_thd_id thd_id;
     grpc_credentials_metadata_request *cb_arg =
         grpc_credentials_metadata_request_create(creds, cb, user_data);
-    gpr_thd_new(&thd_id, on_simulated_token_fetch_done, cb_arg, NULL);
+    grpc_executor_enqueue(
+        grpc_closure_create(on_simulated_token_fetch_done, cb_arg), 1);
   } else {
     cb(exec_ctx, user_data, c->md_store->entries, 1, GRPC_CREDENTIALS_OK);
   }

src/core/surface/call.c

@@ -341,21 +341,18 @@ grpc_completion_queue *grpc_call_get_completion_queue(grpc_call *call) {
 }
 
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
-void grpc_call_internal_ref(grpc_call *c, const char *reason) {
+#define REF_REASON reason
-  grpc_call_stack_ref(CALL_STACK_FROM_CALL(c), reason);
+#define REF_ARG , const char *reason
-}
-void grpc_call_internal_unref(grpc_exec_ctx *exec_ctx, grpc_call *c,
-                              const char *reason) {
-  grpc_call_stack_unref(exec_ctx, CALL_STACK_FROM_CALL(c), reason);
-}
 #else
-void grpc_call_internal_ref(grpc_call *c) {
+#define REF_REASON ""
-  grpc_call_stack_ref(CALL_STACK_FROM_CALL(c));
+#define REF_ARG
+#endif
+void grpc_call_internal_ref(grpc_call *c REF_ARG) {
+  GRPC_CALL_STACK_REF(CALL_STACK_FROM_CALL(c), REF_REASON);
 }
-void grpc_call_internal_unref(grpc_exec_ctx *exec_ctx, grpc_call *c) {
+void grpc_call_internal_unref(grpc_exec_ctx *exec_ctx, grpc_call *c REF_ARG) {
-  grpc_call_stack_unref(exec_ctx, CALL_STACK_FROM_CALL(c));
+  GRPC_CALL_STACK_UNREF(exec_ctx, CALL_STACK_FROM_CALL(c), REF_REASON);
 }
-#endif
 
 static void destroy_call(grpc_exec_ctx *exec_ctx, void *call, int success) {
   size_t i;
@@ -742,8 +739,15 @@ static void execute_op(grpc_exec_ctx *exec_ctx, grpc_call *call,
 char *grpc_call_get_peer(grpc_call *call) {
   grpc_call_element *elem = CALL_ELEM_FROM_CALL(call, 0);
   grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
-  char *result = elem->filter->get_peer(&exec_ctx, elem);
+  char *result;
   GRPC_API_TRACE("grpc_call_get_peer(%p)", 1, (call));
+  result = elem->filter->get_peer(&exec_ctx, elem);
+  if (result == NULL) {
+    result = grpc_channel_get_target(call->channel);
+  }
+  if (result == NULL) {
+    result = gpr_strdup("unknown");
+  }
   grpc_exec_ctx_finish(&exec_ctx);
   return result;
 }

src/core/surface/channel.c

@@ -63,7 +63,6 @@ typedef struct registered_call {
 
 struct grpc_channel {
   int is_client;
-  gpr_refcount refs;
   gpr_uint32 max_message_length;
   grpc_mdelem *default_authority;
 
@@ -81,6 +80,8 @@ struct grpc_channel {
 /* the protobuf library will (by default) start warning at 100megs */
 #define DEFAULT_MAX_MESSAGE_LENGTH (100 * 1024 * 1024)
 
+static void destroy_channel(grpc_exec_ctx *exec_ctx, void *arg, int success);
+
 grpc_channel *grpc_channel_create_from_filters(
     grpc_exec_ctx *exec_ctx, const char *target,
     const grpc_channel_filter **filters, size_t num_filters,
@@ -93,8 +94,6 @@ grpc_channel *grpc_channel_create_from_filters(
   channel->target = gpr_strdup(target);
   GPR_ASSERT(grpc_is_initialized() && "call grpc_init()");
   channel->is_client = is_client;
-  /* decremented by grpc_channel_destroy */
-  gpr_ref_init(&channel->refs, 1);
   gpr_mu_init(&channel->registered_call_mu);
   channel->registered_calls = NULL;
 
@@ -152,7 +151,9 @@ grpc_channel *grpc_channel_create_from_filters(
     gpr_free(default_authority);
   }
 
-  grpc_channel_stack_init(exec_ctx, filters, num_filters, channel, args,
+  grpc_channel_stack_init(exec_ctx, 1, destroy_channel, channel, filters,
+                          num_filters, args,
+                          is_client ? "CLIENT_CHANNEL" : "SERVER_CHANNEL",
                           CHANNEL_STACK_FROM_CHANNEL(channel));
 
   return channel;
@@ -249,17 +250,25 @@ grpc_call *grpc_channel_create_registered_call(
       rc->authority ? GRPC_MDELEM_REF(rc->authority) : NULL, deadline);
 }
 
-#ifdef GRPC_CHANNEL_REF_COUNT_DEBUG
+#ifdef GRPC_STREAM_REFCOUNT_DEBUG
-void grpc_channel_internal_ref(grpc_channel *c, const char *reason) {
+#define REF_REASON reason
-  gpr_log(GPR_DEBUG, "CHANNEL:   ref %p %d -> %d [%s]", c, c->refs.count,
+#define REF_ARG , const char *reason
-          c->refs.count + 1, reason);
 #else
-void grpc_channel_internal_ref(grpc_channel *c) {
+#define REF_REASON ""
+#define REF_ARG
 #endif
-  gpr_ref(&c->refs);
+void grpc_channel_internal_ref(grpc_channel *c REF_ARG) {
+  GRPC_CHANNEL_STACK_REF(CHANNEL_STACK_FROM_CHANNEL(c), REF_REASON);
 }
 
-static void destroy_channel(grpc_exec_ctx *exec_ctx, grpc_channel *channel) {
+void grpc_channel_internal_unref(grpc_exec_ctx *exec_ctx,
+                                 grpc_channel *c REF_ARG) {
+  GRPC_CHANNEL_STACK_UNREF(exec_ctx, CHANNEL_STACK_FROM_CHANNEL(c), REF_REASON);
+}
+
+static void destroy_channel(grpc_exec_ctx *exec_ctx, void *arg,
+                            int iomgr_success) {
+  grpc_channel *channel = arg;
   grpc_channel_stack_destroy(exec_ctx, CHANNEL_STACK_FROM_CHANNEL(channel));
   while (channel->registered_calls) {
     registered_call *rc = channel->registered_calls;
@@ -278,20 +287,6 @@ static void destroy_channel(grpc_exec_ctx *exec_ctx, grpc_channel *channel) {
   gpr_free(channel);
 }
 
-#ifdef GRPC_CHANNEL_REF_COUNT_DEBUG
-void grpc_channel_internal_unref(grpc_exec_ctx *exec_ctx, grpc_channel *channel,
-                                 const char *reason) {
-  gpr_log(GPR_DEBUG, "CHANNEL: unref %p %d -> %d [%s]", channel,
-          channel->refs.count, channel->refs.count - 1, reason);
-#else
-void grpc_channel_internal_unref(grpc_exec_ctx *exec_ctx,
-                                 grpc_channel *channel) {
-#endif
-  if (gpr_unref(&channel->refs)) {
-    destroy_channel(exec_ctx, channel);
-  }
-}
-
 void grpc_channel_destroy(grpc_channel *channel) {
   grpc_transport_op op;
   grpc_channel_element *elem;

src/core/surface/channel.h

@@ -53,7 +53,7 @@ grpc_mdelem *grpc_channel_get_reffed_status_elem(grpc_channel *channel,
                                                  int status_code);
 gpr_uint32 grpc_channel_get_max_message_length(grpc_channel *channel);
 
-#ifdef GRPC_CHANNEL_REF_COUNT_DEBUG
+#ifdef GRPC_STREAM_REFCOUNT_DEBUG
 void grpc_channel_internal_ref(grpc_channel *channel, const char *reason);
 void grpc_channel_internal_unref(grpc_exec_ctx *exec_ctx, grpc_channel *channel,
                                  const char *reason);

src/core/surface/channel_connectivity.c

@@ -83,7 +83,6 @@ typedef struct {
   gpr_mu mu;
   callback_phase phase;
   int success;
-  int removed;
   grpc_closure on_complete;
   grpc_timer alarm;
   grpc_connectivity_state state;
@@ -135,30 +134,15 @@ static void finished_completion(grpc_exec_ctx *exec_ctx, void *pw,
 static void partly_done(grpc_exec_ctx *exec_ctx, state_watcher *w,
                         int due_to_completion) {
   int delete = 0;
-  grpc_channel_element *client_channel_elem = NULL;
 
-  gpr_mu_lock(&w->mu);
-  if (w->removed == 0) {
-    w->removed = 1;
-    client_channel_elem = grpc_channel_stack_last_element(
-        grpc_channel_get_channel_stack(w->channel));
-    if (client_channel_elem->filter == &grpc_client_channel_filter) {
-      grpc_client_channel_del_interested_party(exec_ctx, client_channel_elem,
-                                               grpc_cq_pollset(w->cq));
-    } else {
-      grpc_client_uchannel_del_interested_party(exec_ctx, client_channel_elem,
-                                                grpc_cq_pollset(w->cq));
-    }
-  }
-  gpr_mu_unlock(&w->mu);
   if (due_to_completion) {
-    gpr_mu_lock(&w->mu);
-    w->success = 1;
-    gpr_mu_unlock(&w->mu);
     grpc_timer_cancel(exec_ctx, &w->alarm);
   }
 
   gpr_mu_lock(&w->mu);
+  if (due_to_completion) {
+    w->success = 1;
+  }
   switch (w->phase) {
     case WAITING:
       w->phase = CALLING_BACK;
@@ -212,7 +196,6 @@ void grpc_channel_watch_connectivity_state(
   w->phase = WAITING;
   w->state = last_observed_state;
   w->success = 0;
-  w->removed = 0;
   w->cq = cq;
   w->tag = tag;
   w->channel = channel;
@@ -223,16 +206,14 @@ void grpc_channel_watch_connectivity_state(
 
   if (client_channel_elem->filter == &grpc_client_channel_filter) {
     GRPC_CHANNEL_INTERNAL_REF(channel, "watch_channel_connectivity");
-    grpc_client_channel_add_interested_party(&exec_ctx, client_channel_elem,
-                                             grpc_cq_pollset(cq));
     grpc_client_channel_watch_connectivity_state(&exec_ctx, client_channel_elem,
-                                                 &w->state, &w->on_complete);
+                                                 grpc_cq_pollset(cq), &w->state,
+                                                 &w->on_complete);
   } else if (client_channel_elem->filter == &grpc_client_uchannel_filter) {
     GRPC_CHANNEL_INTERNAL_REF(channel, "watch_uchannel_connectivity");
-    grpc_client_uchannel_add_interested_party(&exec_ctx, client_channel_elem,
-                                              grpc_cq_pollset(cq));
     grpc_client_uchannel_watch_connectivity_state(
-        &exec_ctx, client_channel_elem, &w->state, &w->on_complete);
+        &exec_ctx, client_channel_elem, grpc_cq_pollset(cq), &w->state,
+        &w->on_complete);
   }
 
   grpc_exec_ctx_finish(&exec_ctx);

src/core/surface/channel_create.c

@@ -171,7 +171,6 @@ static grpc_subchannel *subchannel_factory_create_subchannel(
   c->base.vtable = &connector_vtable;
   gpr_ref_init(&c->refs, 1);
   args->args = final_args;
-  args->master = f->master;
   s = grpc_subchannel_create(&c->base, args);
   grpc_connector_unref(exec_ctx, &c->base);
   grpc_channel_args_destroy(final_args);

src/core/surface/lame_client.c

@@ -49,7 +49,6 @@ typedef struct {
 } call_data;
 
 typedef struct {
-  grpc_channel *master;
   grpc_status_code error_code;
   const char *error_message;
 } channel_data;
@@ -84,8 +83,7 @@ static void lame_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
 }
 
 static char *lame_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
-  channel_data *chand = elem->channel_data;
+  return NULL;
-  return grpc_channel_get_target(chand->master);
 }
 
 static void lame_start_transport_op(grpc_exec_ctx *exec_ctx,
@@ -111,10 +109,8 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx,
 static void init_channel_elem(grpc_exec_ctx *exec_ctx,
                               grpc_channel_element *elem,
                               grpc_channel_element_args *args) {
-  channel_data *chand = elem->channel_data;
   GPR_ASSERT(args->is_first);
   GPR_ASSERT(args->is_last);
-  chand->master = args->master;
 }
 
 static void destroy_channel_elem(grpc_exec_ctx *exec_ctx,

src/core/surface/secure_channel_create.c

@@ -228,7 +228,6 @@ static grpc_subchannel *subchannel_factory_create_subchannel(
   gpr_mu_init(&c->mu);
   gpr_ref_init(&c->refs, 1);
   args->args = final_args;
-  args->master = f->master;
   s = grpc_subchannel_create(&c->base, args);
   grpc_connector_unref(exec_ctx, &c->base);
   grpc_channel_args_destroy(final_args);

src/core/transport/chttp2_transport.c

@@ -910,7 +910,7 @@ static void perform_transport_op(grpc_exec_ctx *exec_ctx, grpc_transport *gt,
 
   grpc_exec_ctx_enqueue(exec_ctx, op->on_consumed, 1);
 
-  if (op->on_connectivity_state_change) {
+  if (op->on_connectivity_state_change != NULL) {
     grpc_connectivity_state_notify_on_state_change(
         exec_ctx, &t->channel_callback.state_tracker, op->connectivity_state,
         op->on_connectivity_state_change);

src/core/transport/connectivity_state.c

@@ -88,7 +88,7 @@ void grpc_connectivity_state_destroy(grpc_exec_ctx *exec_ctx,
 grpc_connectivity_state grpc_connectivity_state_check(
     grpc_connectivity_state_tracker *tracker) {
   if (grpc_connectivity_state_trace) {
-    gpr_log(GPR_DEBUG, "CONWATCH: %s: get %s", tracker->name,
+    gpr_log(GPR_DEBUG, "CONWATCH: %p %s: get %s", tracker, tracker->name,
             grpc_connectivity_state_name(tracker->current_state));
   }
   return tracker->current_state;
@@ -98,42 +98,47 @@ int grpc_connectivity_state_notify_on_state_change(
     grpc_exec_ctx *exec_ctx, grpc_connectivity_state_tracker *tracker,
     grpc_connectivity_state *current, grpc_closure *notify) {
   if (grpc_connectivity_state_trace) {
-    gpr_log(GPR_DEBUG, "CONWATCH: %s: from %s [cur=%s] notify=%p",
+    if (current == NULL) {
-            tracker->name, grpc_connectivity_state_name(*current),
+      gpr_log(GPR_DEBUG, "CONWATCH: %p %s: unsubscribe notify=%p", tracker,
-            grpc_connectivity_state_name(tracker->current_state), notify);
+              tracker->name, notify);
+    } else {
+      gpr_log(GPR_DEBUG, "CONWATCH: %p %s: from %s [cur=%s] notify=%p", tracker,
+              tracker->name, grpc_connectivity_state_name(*current),
+              grpc_connectivity_state_name(tracker->current_state), notify);
+    }
   }
-  if (tracker->current_state != *current) {
+  if (current == NULL) {
-    *current = tracker->current_state;
+    grpc_connectivity_state_watcher *w = tracker->watchers;
-    grpc_exec_ctx_enqueue(exec_ctx, notify, 1);
+    if (w != NULL && w->notify == notify) {
+      grpc_exec_ctx_enqueue(exec_ctx, notify, 0);
+      tracker->watchers = w->next;
+      gpr_free(w);
+      return 0;
+    }
+    while (w != NULL) {
+      grpc_connectivity_state_watcher *rm_candidate = w->next;
+      if (rm_candidate != NULL && rm_candidate->notify == notify) {
+        grpc_exec_ctx_enqueue(exec_ctx, notify, 0);
+        w->next = w->next->next;
+        gpr_free(rm_candidate);
+        return 0;
+      }
+      w = w->next;
+    }
+    return 0;
   } else {
-    grpc_connectivity_state_watcher *w = gpr_malloc(sizeof(*w));
+    if (tracker->current_state != *current) {
-    w->current = current;
+      *current = tracker->current_state;
-    w->notify = notify;
+      grpc_exec_ctx_enqueue(exec_ctx, notify, 1);
-    w->next = tracker->watchers;
+    } else {
-    tracker->watchers = w;
+      grpc_connectivity_state_watcher *w = gpr_malloc(sizeof(*w));
-  }
+      w->current = current;
-  return tracker->current_state == GRPC_CHANNEL_IDLE;
+      w->notify = notify;
-}
+      w->next = tracker->watchers;
-
+      tracker->watchers = w;
-int grpc_connectivity_state_change_unsubscribe(
-    grpc_exec_ctx *exec_ctx, grpc_connectivity_state_tracker *tracker,
-    grpc_closure *subscribed_notify) {
-  grpc_connectivity_state_watcher *w = tracker->watchers;
-  if (w != NULL && w->notify == subscribed_notify) {
-    tracker->watchers = w->next;
-    gpr_free(w);
-    return 1;
-  }
-  while (w != NULL) {
-    grpc_connectivity_state_watcher *rm_candidate = w->next;
-    if (rm_candidate != NULL && rm_candidate->notify == subscribed_notify) {
-      w->next = w->next->next;
-      gpr_free(rm_candidate);
-      return 1;
     }
-    w = w->next;
+    return tracker->current_state == GRPC_CHANNEL_IDLE;
   }
-  return 0;
 }
 
 void grpc_connectivity_state_set(grpc_exec_ctx *exec_ctx,
@@ -142,7 +147,7 @@ void grpc_connectivity_state_set(grpc_exec_ctx *exec_ctx,
                                  const char *reason) {
   grpc_connectivity_state_watcher *w;
   if (grpc_connectivity_state_trace) {
-    gpr_log(GPR_DEBUG, "SET: %s: %s --> %s [%s]", tracker->name,
+    gpr_log(GPR_DEBUG, "SET: %p %s: %s --> %s [%s]", tracker, tracker->name,
             grpc_connectivity_state_name(tracker->current_state),
             grpc_connectivity_state_name(state), reason);
   }

src/core/transport/connectivity_state.h

@@ -73,16 +73,11 @@ void grpc_connectivity_state_set(grpc_exec_ctx *exec_ctx,
 grpc_connectivity_state grpc_connectivity_state_check(
     grpc_connectivity_state_tracker *tracker);
 
-/** Return 1 if the channel should start connecting, 0 otherwise */
+/** Return 1 if the channel should start connecting, 0 otherwise.
+    If current==NULL cancel notify if it is already queued (success==0 in that
+    case) */
 int grpc_connectivity_state_notify_on_state_change(
     grpc_exec_ctx *exec_ctx, grpc_connectivity_state_tracker *tracker,
     grpc_connectivity_state *current, grpc_closure *notify);
 
-/** Remove \a subscribed_notify from the list of closures to be called on a
- * state change if present, returning 1. Otherwise, nothing is done and return
- * 0. */
-int grpc_connectivity_state_change_unsubscribe(
-    grpc_exec_ctx *exec_ctx, grpc_connectivity_state_tracker *tracker,
-    grpc_closure *subscribed_notify);
-
 #endif /* GRPC_INTERNAL_CORE_TRANSPORT_CONNECTIVITY_STATE_H */

src/core/transport/static_metadata.c

@@ -65,92 +65,23 @@ const gpr_uint8
         80, 81, 82, 33, 83, 33, 84, 33, 85, 33, 86, 33};
 
 const char *const grpc_static_metadata_strings[GRPC_STATIC_MDSTR_COUNT] = {
-    "0",
+    "0", "1", "2", "200", "204", "206", "304", "400", "404", "500", "accept",
-    "1",
+    "accept-charset", "accept-encoding", "accept-language", "accept-ranges",
-    "2",
+    "access-control-allow-origin", "age", "allow", "application/grpc",
-    "200",
+    ":authority", "authorization", "cache-control", "content-disposition",
-    "204",
+    "content-encoding", "content-language", "content-length",
-    "206",
+    "content-location", "content-range", "content-type", "cookie", "date",
-    "304",
+    "deflate", "deflate,gzip", "", "etag", "expect", "expires", "from", "GET",
-    "400",
+    "grpc", "grpc-accept-encoding", "grpc-encoding",
-    "404",
+    "grpc-internal-encoding-request", "grpc-message", "grpc-status",
-    "500",
+    "grpc-timeout", "gzip", "gzip, deflate", "host", "http", "https",
-    "accept",
+    "identity", "identity,deflate", "identity,deflate,gzip", "identity,gzip",
-    "accept-charset",
+    "if-match", "if-modified-since", "if-none-match", "if-range",
-    "accept-encoding",
+    "if-unmodified-since", "last-modified", "link", "location", "max-forwards",
-    "accept-language",
+    ":method", ":path", "POST", "proxy-authenticate", "proxy-authorization",
-    "accept-ranges",
+    "range", "referer", "refresh", "retry-after", ":scheme", "server",
-    "access-control-allow-origin",
+    "set-cookie", "/", "/index.html", ":status", "strict-transport-security",
-    "age",
+    "te", "trailers", "transfer-encoding", "user-agent", "vary", "via",
-    "allow",
-    "application/grpc",
-    ":authority",
-    "authorization",
-    "cache-control",
-    "content-disposition",
-    "content-encoding",
-    "content-language",
-    "content-length",
-    "content-location",
-    "content-range",
-    "content-type",
-    "cookie",
-    "date",
-    "deflate",
-    "deflate,gzip",
-    "",
-    "etag",
-    "expect",
-    "expires",
-    "from",
-    "GET",
-    "grpc",
-    "grpc-accept-encoding",
-    "grpc-encoding",
-    "grpc-internal-encoding-request",
-    "grpc-message",
-    "grpc-status",
-    "grpc-timeout",
-    "gzip",
-    "gzip, deflate",
-    "host",
-    "http",
-    "https",
-    "identity",
-    "identity,deflate",
-    "identity,deflate,gzip",
-    "identity,gzip",
-    "if-match",
-    "if-modified-since",
-    "if-none-match",
-    "if-range",
-    "if-unmodified-since",
-    "last-modified",
-    "link",
-    "location",
-    "max-forwards",
-    ":method",
-    ":path",
-    "POST",
-    "proxy-authenticate",
-    "proxy-authorization",
-    "range",
-    "referer",
-    "refresh",
-    "retry-after",
-    ":scheme",
-    "server",
-    "set-cookie",
-    "/",
-    "/index.html",
-    ":status",
-    "strict-transport-security",
-    "te",
-    "trailers",
-    "transfer-encoding",
-    "user-agent",
-    "vary",
-    "via",
     "www-authenticate"};
 
 const gpr_uint8 grpc_static_accept_encoding_metadata[8] = {0,  29, 26, 30,

src/core/transport/transport.c

@@ -40,8 +40,8 @@
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
 void grpc_stream_ref(grpc_stream_refcount *refcount, const char *reason) {
   gpr_atm val = gpr_atm_no_barrier_load(&refcount->refs.count);
-  gpr_log(GPR_DEBUG, "STREAM %p:%p   REF %d->%d %s", refcount,
+  gpr_log(GPR_DEBUG, "%s %p:%p   REF %d->%d %s", refcount->object_type,
-          refcount->destroy.cb_arg, val, val + 1, reason);
+          refcount, refcount->destroy.cb_arg, val, val + 1, reason);
 #else
 void grpc_stream_ref(grpc_stream_refcount *refcount) {
 #endif
@@ -52,8 +52,8 @@ void grpc_stream_ref(grpc_stream_refcount *refcount) {
 void grpc_stream_unref(grpc_exec_ctx *exec_ctx, grpc_stream_refcount *refcount,
                        const char *reason) {
   gpr_atm val = gpr_atm_no_barrier_load(&refcount->refs.count);
-  gpr_log(GPR_DEBUG, "STREAM %p:%p UNREF %d->%d %s", refcount,
+  gpr_log(GPR_DEBUG, "%s %p:%p UNREF %d->%d %s", refcount->object_type,
-          refcount->destroy.cb_arg, val, val - 1, reason);
+          refcount, refcount->destroy.cb_arg, val, val - 1, reason);
 #else
 void grpc_stream_unref(grpc_exec_ctx *exec_ctx,
                        grpc_stream_refcount *refcount) {
@@ -63,6 +63,19 @@ void grpc_stream_unref(grpc_exec_ctx *exec_ctx,
   }
 }
 
+#ifdef GRPC_STREAM_REFCOUNT_DEBUG
+void grpc_stream_ref_init(grpc_stream_refcount *refcount, int initial_refs,
+                          grpc_iomgr_cb_func cb, void *cb_arg,
+                          const char *object_type) {
+  refcount->object_type = object_type;
+#else
+void grpc_stream_ref_init(grpc_stream_refcount *refcount, int initial_refs,
+                          grpc_iomgr_cb_func cb, void *cb_arg) {
+#endif
+  gpr_ref_init(&refcount->refs, initial_refs);
+  grpc_closure_init(&refcount->destroy, cb, cb_arg);
+}
+
 size_t grpc_transport_stream_size(grpc_transport *transport) {
   return transport->vtable->sizeof_stream;
 }

src/core/transport/transport.h

@@ -50,19 +50,32 @@ typedef struct grpc_transport grpc_transport;
    for a stream. */
 typedef struct grpc_stream grpc_stream;
 
+/*#define GRPC_STREAM_REFCOUNT_DEBUG*/
+
 typedef struct grpc_stream_refcount {
   gpr_refcount refs;
   grpc_closure destroy;
+#ifdef GRPC_STREAM_REFCOUNT_DEBUG
+  const char *object_type;
+#endif
 } grpc_stream_refcount;
 
-/*#define GRPC_STREAM_REFCOUNT_DEBUG*/
 #ifdef GRPC_STREAM_REFCOUNT_DEBUG
+void grpc_stream_ref_init(grpc_stream_refcount *refcount, int initial_refs,
+                          grpc_iomgr_cb_func cb, void *cb_arg,
+                          const char *object_type);
 void grpc_stream_ref(grpc_stream_refcount *refcount, const char *reason);
 void grpc_stream_unref(grpc_exec_ctx *exec_ctx, grpc_stream_refcount *refcount,
                        const char *reason);
+#define GRPC_STREAM_REF_INIT(rc, ir, cb, cb_arg, objtype) \
+  grpc_stream_ref_init(rc, ir, cb, cb_arg, objtype)
 #else
+void grpc_stream_ref_init(grpc_stream_refcount *refcount, int initial_refs,
+                          grpc_iomgr_cb_func cb, void *cb_arg);
 void grpc_stream_ref(grpc_stream_refcount *refcount);
 void grpc_stream_unref(grpc_exec_ctx *exec_ctx, grpc_stream_refcount *refcount);
+#define GRPC_STREAM_REF_INIT(rc, ir, cb, cb_arg, objtype) \
+  grpc_stream_ref_init(rc, ir, cb, cb_arg)
 #endif
 
 /* Transport stream op: a set of operations to perform on a transport
@@ -96,7 +109,7 @@ typedef struct grpc_transport_stream_op {
 typedef struct grpc_transport_op {
   /** called when processing of this op is done */
   grpc_closure *on_consumed;
-  /** connectivity monitoring */
+  /** connectivity monitoring - set connectivity_state to NULL to unsubscribe */
   grpc_closure *on_connectivity_state_change;
   grpc_connectivity_state *connectivity_state;
   /** should the transport be disconnected */

src/php/bin/run_tests.sh

@@ -30,7 +30,7 @@
 
 # Loads the local shared library, and runs all of the test cases in tests/
 # against it
-set -e
+set -ex
 cd $(dirname $0)/../../..
 root=$(pwd)
 cd src/php/bin

test/core/channel/channel_stack_test.c

@@ -81,6 +81,16 @@ static char *get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
   return gpr_strdup("peer");
 }
 
+static void free_channel(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+  grpc_channel_stack_destroy(exec_ctx, arg);
+  gpr_free(arg);
+}
+
+static void free_call(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+  grpc_call_stack_destroy(exec_ctx, arg);
+  gpr_free(arg);
+}
+
 static void test_create_channel_stack(void) {
   const grpc_channel_filter filter = {
       call_func, channel_func, sizeof(int), call_init_func,
@@ -105,16 +115,16 @@ static void test_create_channel_stack(void) {
   chan_args.args = &arg;
 
   channel_stack = gpr_malloc(grpc_channel_stack_size(&filters, 1));
-  grpc_channel_stack_init(&exec_ctx, &filters, 1, NULL, &chan_args,
+  grpc_channel_stack_init(&exec_ctx, 1, free_channel, channel_stack, &filters,
-                          channel_stack);
+                          1, &chan_args, "test", channel_stack);
   GPR_ASSERT(channel_stack->count == 1);
   channel_elem = grpc_channel_stack_element(channel_stack, 0);
   channel_data = (int *)channel_elem->channel_data;
   GPR_ASSERT(*channel_data == 0);
 
   call_stack = gpr_malloc(channel_stack->call_stack_size);
-  grpc_call_stack_init(&exec_ctx, channel_stack, 0, NULL, NULL, NULL, NULL,
+  grpc_call_stack_init(&exec_ctx, channel_stack, 1, free_call, call_stack, NULL,
-                       call_stack);
+                       NULL, call_stack);
   GPR_ASSERT(call_stack->count == 1);
   call_elem = grpc_call_stack_element(call_stack, 0);
   GPR_ASSERT(call_elem->filter == channel_elem->filter);
@@ -123,12 +133,11 @@ static void test_create_channel_stack(void) {
   GPR_ASSERT(*call_data == 0);
   GPR_ASSERT(*channel_data == 1);
 
-  grpc_call_stack_destroy(&exec_ctx, call_stack);
+  GRPC_CALL_STACK_UNREF(&exec_ctx, call_stack, "done");
-  gpr_free(call_stack);
+  grpc_exec_ctx_flush(&exec_ctx);
   GPR_ASSERT(*channel_data == 2);
 
-  grpc_channel_stack_destroy(&exec_ctx, channel_stack);
+  GRPC_CHANNEL_STACK_UNREF(&exec_ctx, channel_stack, "done");
-  gpr_free(channel_stack);
 
   grpc_exec_ctx_finish(&exec_ctx);
 }

test/core/client_config/lb_policies_test.c

@@ -135,9 +135,8 @@ static void kill_server(const servers_fixture *f, size_t i) {
   gpr_log(GPR_INFO, "KILLING SERVER %d", i);
   GPR_ASSERT(f->servers[i] != NULL);
   grpc_server_shutdown_and_notify(f->servers[i], f->cq, tag(10000));
-  GPR_ASSERT(
+  GPR_ASSERT(grpc_completion_queue_pluck(f->cq, tag(10000), n_millis_time(5000),
-      grpc_completion_queue_pluck(f->cq, tag(10000), n_millis_time(5000), NULL)
+                                         NULL).type == GRPC_OP_COMPLETE);
-          .type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->servers[i]);
   f->servers[i] = NULL;
 }
@@ -203,8 +202,8 @@ static void teardown_servers(servers_fixture *f) {
     if (f->servers[i] == NULL) continue;
     grpc_server_shutdown_and_notify(f->servers[i], f->cq, tag(10000));
     GPR_ASSERT(grpc_completion_queue_pluck(f->cq, tag(10000),
-                                           n_millis_time(5000), NULL)
+                                           n_millis_time(5000),
-                   .type == GRPC_OP_COMPLETE);
+                                           NULL).type == GRPC_OP_COMPLETE);
     grpc_server_destroy(f->servers[i]);
   }
   grpc_completion_queue_shutdown(f->cq);
@@ -304,8 +303,8 @@ int *perform_request(servers_fixture *f, grpc_channel *client,
 
     s_idx = -1;
     while ((ev = grpc_completion_queue_next(
-                f->cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1), NULL))
+                f->cq, GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1), NULL)).type !=
-               .type != GRPC_QUEUE_TIMEOUT) {
+           GRPC_QUEUE_TIMEOUT) {
       GPR_ASSERT(ev.type == GRPC_OP_COMPLETE);
       read_tag = ((int)(gpr_intptr)ev.tag);
       gpr_log(GPR_DEBUG, "EVENT: success:%d, type:%d, tag:%d iter:%d",

test/core/end2end/fixtures/h2_uchannel.c

@@ -159,11 +159,14 @@ static grpc_subchannel *subchannel_factory_create_subchannel(
   c->base.vtable = &connector_vtable;
   gpr_ref_init(&c->refs, 1);
   args->args = final_args;
-  args->master = f->master;
   s = grpc_subchannel_create(&c->base, args);
   grpc_connector_unref(exec_ctx, &c->base);
   grpc_channel_args_destroy(final_args);
+  if (*f->sniffed_subchannel) {
+    GRPC_SUBCHANNEL_UNREF(exec_ctx, *f->sniffed_subchannel, "sniffed");
+  }
   *f->sniffed_subchannel = s;
+  GRPC_SUBCHANNEL_REF(s, "sniffed");
   return s;
 }
 
@@ -224,6 +227,7 @@ static grpc_end2end_test_fixture chttp2_create_fixture_micro_fullstack(
   micro_fullstack_fixture_data *ffd =
       gpr_malloc(sizeof(micro_fullstack_fixture_data));
   memset(&f, 0, sizeof(f));
+  memset(ffd, 0, sizeof(*ffd));
 
   gpr_join_host_port(&ffd->localaddr, "127.0.0.1", port);
 
@@ -233,10 +237,54 @@ static grpc_end2end_test_fixture chttp2_create_fixture_micro_fullstack(
   return f;
 }
 
+grpc_connectivity_state g_state = GRPC_CHANNEL_IDLE;
+grpc_pollset_set g_interested_parties;
+
+static void state_changed(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+  if (g_state != GRPC_CHANNEL_READY) {
+    grpc_subchannel_notify_on_state_change(
+        exec_ctx, arg, &g_interested_parties, &g_state,
+        grpc_closure_create(state_changed, arg));
+  }
+}
+
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+  grpc_pollset_destroy(arg);
+}
+
+static grpc_connected_subchannel *connect_subchannel(grpc_subchannel *c) {
+  grpc_pollset pollset;
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
+  grpc_pollset_init(&pollset);
+  grpc_pollset_set_init(&g_interested_parties);
+  grpc_pollset_set_add_pollset(&exec_ctx, &g_interested_parties, &pollset);
+  grpc_subchannel_notify_on_state_change(&exec_ctx, c, &g_interested_parties,
+                                         &g_state,
+                                         grpc_closure_create(state_changed, c));
+  grpc_exec_ctx_flush(&exec_ctx);
+  gpr_mu_lock(GRPC_POLLSET_MU(&pollset));
+  while (g_state != GRPC_CHANNEL_READY) {
+    grpc_pollset_worker worker;
+    grpc_pollset_work(&exec_ctx, &pollset, &worker,
+                      gpr_now(GPR_CLOCK_MONOTONIC),
+                      GRPC_TIMEOUT_SECONDS_TO_DEADLINE(1));
+    gpr_mu_unlock(GRPC_POLLSET_MU(&pollset));
+    grpc_exec_ctx_flush(&exec_ctx);
+    gpr_mu_lock(GRPC_POLLSET_MU(&pollset));
+  }
+  grpc_pollset_shutdown(&exec_ctx, &pollset,
+                        grpc_closure_create(destroy_pollset, &pollset));
+  grpc_pollset_set_destroy(&g_interested_parties);
+  gpr_mu_unlock(GRPC_POLLSET_MU(&pollset));
+  grpc_exec_ctx_finish(&exec_ctx);
+  return grpc_subchannel_get_connected_subchannel(c);
+}
+
 static void chttp2_init_client_micro_fullstack(grpc_end2end_test_fixture *f,
                                                grpc_channel_args *client_args) {
   micro_fullstack_fixture_data *ffd = f->fixture_data;
   grpc_connectivity_state conn_state;
+  grpc_connected_subchannel *connected;
   char *ipv4_localaddr;
 
   gpr_asprintf(&ipv4_localaddr, "ipv4:%s", ffd->localaddr);
@@ -252,8 +300,10 @@ static void chttp2_init_client_micro_fullstack(grpc_end2end_test_fixture *f,
   /* here sniffed_subchannel should be ready to use */
   GPR_ASSERT(conn_state == GRPC_CHANNEL_IDLE);
   GPR_ASSERT(ffd->sniffed_subchannel != NULL);
+
+  connected = connect_subchannel(ffd->sniffed_subchannel);
   f->client = grpc_client_uchannel_create(ffd->sniffed_subchannel, client_args);
-  grpc_client_uchannel_set_subchannel(f->client, ffd->sniffed_subchannel);
+  grpc_client_uchannel_set_connected_subchannel(f->client, connected);
   gpr_log(GPR_INFO, "CHANNEL WRAPPING SUBCHANNEL: %p(%p)", f->client,
           ffd->sniffed_subchannel);
 
@@ -273,18 +323,22 @@ static void chttp2_init_server_micro_fullstack(grpc_end2end_test_fixture *f,
 }
 
 static void chttp2_tear_down_micro_fullstack(grpc_end2end_test_fixture *f) {
+  grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
   micro_fullstack_fixture_data *ffd = f->fixture_data;
   grpc_channel_destroy(ffd->master_channel);
-  ffd->master_channel = NULL;
+  if (ffd->sniffed_subchannel) {
+    GRPC_SUBCHANNEL_UNREF(&exec_ctx, ffd->sniffed_subchannel, "sniffed");
+  }
   gpr_free(ffd->localaddr);
   gpr_free(ffd);
+  grpc_exec_ctx_finish(&exec_ctx);
 }
 
 /* All test configurations */
 static grpc_end2end_test_config configs[] = {
-    {"chttp2/micro_fullstack", FEATURE_MASK_SUPPORTS_DELAYED_CONNECTION,
+    {"chttp2/micro_fullstack", 0, chttp2_create_fixture_micro_fullstack,
-     chttp2_create_fixture_micro_fullstack, chttp2_init_client_micro_fullstack,
+     chttp2_init_client_micro_fullstack, chttp2_init_server_micro_fullstack,
-     chttp2_init_server_micro_fullstack, chttp2_tear_down_micro_fullstack},
+     chttp2_tear_down_micro_fullstack},
 };
 
 int main(int argc, char **argv) {

test/core/end2end/gen_build_yaml.py

@@ -66,7 +66,7 @@ END2END_FIXTURES = {
     'h2_ssl+poll': default_secure_fixture_options._replace(platforms=['linux']),
     'h2_ssl_proxy': default_secure_fixture_options._replace(includes_proxy=True,
                                                             ci_mac=False),
-    'h2_uchannel': default_unsecure_fixture_options,
+    'h2_uchannel': default_unsecure_fixture_options._replace(fullstack=False),
     'h2_uds+poll': uds_fixture_options._replace(platforms=['linux']),
     'h2_uds': uds_fixture_options,
 }

test/core/end2end/tests/binary_metadata.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/cancel_after_accept.c

@@ -55,8 +55,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/cancel_after_client_done.c

@@ -55,8 +55,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/cancel_after_invoke.c

@@ -56,8 +56,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s/%s", test_name, config.name, mode.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/cancel_before_invoke.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/cancel_in_a_vacuum.c

@@ -55,8 +55,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/cancel_with_status.c

@@ -56,8 +56,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/census_simple_request.c

@@ -56,8 +56,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/channel_connectivity.c

@@ -153,7 +153,7 @@ static void test_connectivity(grpc_end2end_test_config config) {
   cq_verify(cqv);
   state = grpc_channel_check_connectivity_state(f.client, 0);
   GPR_ASSERT(state == GRPC_CHANNEL_TRANSIENT_FAILURE ||
-             state == GRPC_CHANNEL_CONNECTING);
+             state == GRPC_CHANNEL_CONNECTING || state == GRPC_CHANNEL_IDLE);
 
   /* cleanup server */
   grpc_server_destroy(f.server);

test/core/end2end/tests/compressed_payload.c

@@ -59,8 +59,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/empty_batch.c

@@ -56,8 +56,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/graceful_server_shutdown.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/high_initial_seqno.c

@@ -36,13 +36,15 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "src/core/support/string.h"
 #include <grpc/byte_buffer.h>
 #include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
 #include <grpc/support/time.h>
 #include <grpc/support/useful.h>
+
+#include "src/core/support/string.h"
 #include "test/core/end2end/cq_verifier.h"
 
 enum { TIMEOUT = 200000 };
@@ -56,8 +58,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 
@@ -208,6 +210,7 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   grpc_arg client_arg;
   grpc_channel_args client_args;
+  char *name;
 
   client_arg.type = GRPC_ARG_INTEGER;
   client_arg.key = GRPC_ARG_HTTP2_INITIAL_SEQUENCE_NUMBER;
@@ -216,13 +219,16 @@ static void test_invoke_10_simple_requests(grpc_end2end_test_config config,
   client_args.num_args = 1;
   client_args.args = &client_arg;
 
-  f = begin_test(config, "test_invoke_10_simple_requests", &client_args, NULL);
+  gpr_asprintf(&name, "test_invoke_requests first_seqno=%d",
+               initial_sequence_number);
+  f = begin_test(config, name, &client_args, NULL);
   for (i = 0; i < 10; i++) {
     simple_request_body(f);
     gpr_log(GPR_INFO, "Passed simple request %d", i);
   }
   end_test(&f);
   config.tear_down_data(&f);
+  gpr_free(name);
 }
 
 void grpc_end2end_tests(grpc_end2end_test_config config) {

test/core/end2end/tests/hpack_size.c

@@ -241,8 +241,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 
@@ -262,9 +262,9 @@ static void drain_cq(grpc_completion_queue *cq) {
 static void shutdown_server(grpc_end2end_test_fixture *f) {
   if (!f->server) return;
   grpc_server_shutdown_and_notify(f->server, f->cq, tag(1000));
-  GPR_ASSERT(grpc_completion_queue_pluck(
+  GPR_ASSERT(grpc_completion_queue_pluck(f->cq, tag(1000),
-                 f->cq, tag(1000), GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5), NULL)
+                                         GRPC_TIMEOUT_SECONDS_TO_DEADLINE(5),
-                 .type == GRPC_OP_COMPLETE);
+                                         NULL).type == GRPC_OP_COMPLETE);
   grpc_server_destroy(f->server);
   f->server = NULL;
 }

test/core/end2end/tests/invoke_large_request.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/large_metadata.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/max_concurrent_streams.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/max_message_length.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/metadata.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/negative_deadline.c

@@ -56,8 +56,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/no_op.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/payload.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/ping_pong_streaming.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/registered_call.c

@@ -56,8 +56,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/request_with_flags.c

@@ -55,8 +55,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/request_with_payload.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/server_finishes_request.c

@@ -56,8 +56,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/shutdown_finishes_calls.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/shutdown_finishes_tags.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/simple_request.c

@@ -56,8 +56,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

test/core/end2end/tests/trailing_metadata.c

@@ -54,8 +54,8 @@ static grpc_end2end_test_fixture begin_test(grpc_end2end_test_config config,
   grpc_end2end_test_fixture f;
   gpr_log(GPR_INFO, "%s/%s", test_name, config.name);
   f = config.create_fixture(client_args, server_args);
-  config.init_client(&f, client_args);
   config.init_server(&f, server_args);
+  config.init_client(&f, client_args);
   return f;
 }
 

tools/run_tests/jobset.py

@@ -314,9 +314,13 @@ class Jobset(object):
     self._hashes = {}
     self._add_env = add_env
     self.resultset = {}
-    
+    self._remaining = None
+
+  def set_remaining(self, remaining):
+    self._remaining = remaining
+
   def get_num_failures(self):
-    return self._failures  
+    return self._failures
 
   def start(self, spec):
     """Start a job. Return True on success, False on failure."""
@@ -369,8 +373,9 @@ class Jobset(object):
         self._running.remove(job)
       if dead: return
       if (not self._travis):
-        message('WAITING', '%d jobs running, %d complete, %d failed' % (
+        rstr = '' if self._remaining is None else '%d queued, ' % self._remaining
-            len(self._running), self._completed, self._failures))
+        message('WAITING', '%s%d jobs running, %d complete, %d failed' % (
+            rstr, len(self._running), self._completed, self._failures))
       if platform_string() == 'windows':
         time.sleep(0.1)
       else:
@@ -409,6 +414,17 @@ class NoCache(object):
     pass
 
 
+def tag_remaining(xs):
+  staging = []
+  for x in xs:
+    staging.append(x)
+    if len(staging) > 1000:
+      yield (staging.pop(0), None)
+  n = len(staging)
+  for i, x in enumerate(staging):
+    yield (x, n - i - 1)
+
+
 def run(cmdlines,
         check_cancelled=_never_cancelled,
         maxjobs=None,
@@ -422,8 +438,11 @@ def run(cmdlines,
               maxjobs if maxjobs is not None else _DEFAULT_MAX_JOBS,
               newline_on_success, travis, stop_on_failure, add_env,
               cache if cache is not None else NoCache())
-  for cmdline in cmdlines:
+  for cmdline, remaining in tag_remaining(cmdlines):
     if not js.start(cmdline):
       break
-  js.finish()  
+    if remaining is not None:
+      js.set_remaining(remaining)
+  js.finish()
   return js.get_num_failures(), js.resultset
+

tools/run_tests/sources_and_headers.json

@@ -8210,36 +8210,6 @@
     "name": "h2_uchannel_census_simple_request_test", 
     "src": []
   }, 
-  {
-    "deps": [
-      "end2end_certs", 
-      "end2end_fixture_h2_uchannel", 
-      "end2end_test_channel_connectivity", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_channel_connectivity_test", 
-    "src": []
-  }, 
-  {
-    "deps": [
-      "end2end_certs", 
-      "end2end_fixture_h2_uchannel", 
-      "end2end_test_channel_ping", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_channel_ping_test", 
-    "src": []
-  }, 
   {
     "deps": [
       "end2end_certs", 
@@ -8255,36 +8225,6 @@
     "name": "h2_uchannel_compressed_payload_test", 
     "src": []
   }, 
-  {
-    "deps": [
-      "end2end_certs", 
-      "end2end_fixture_h2_uchannel", 
-      "end2end_test_default_host", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_default_host_test", 
-    "src": []
-  }, 
-  {
-    "deps": [
-      "end2end_certs", 
-      "end2end_fixture_h2_uchannel", 
-      "end2end_test_disappearing_server", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_disappearing_server_test", 
-    "src": []
-  }, 
   {
     "deps": [
       "end2end_certs", 
@@ -8570,21 +8510,6 @@
     "name": "h2_uchannel_shutdown_finishes_tags_test", 
     "src": []
   }, 
-  {
-    "deps": [
-      "end2end_certs", 
-      "end2end_fixture_h2_uchannel", 
-      "end2end_test_simple_delayed_request", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc", 
-      "grpc_test_util"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_simple_delayed_request_test", 
-    "src": []
-  }, 
   {
     "deps": [
       "end2end_certs", 
@@ -13041,34 +12966,6 @@
     "name": "h2_uchannel_census_simple_request_nosec_test", 
     "src": []
   }, 
-  {
-    "deps": [
-      "end2end_nosec_fixture_h2_uchannel", 
-      "end2end_nosec_test_channel_connectivity", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc_test_util_unsecure", 
-      "grpc_unsecure"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_channel_connectivity_nosec_test", 
-    "src": []
-  }, 
-  {
-    "deps": [
-      "end2end_nosec_fixture_h2_uchannel", 
-      "end2end_nosec_test_channel_ping", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc_test_util_unsecure", 
-      "grpc_unsecure"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_channel_ping_nosec_test", 
-    "src": []
-  }, 
   {
     "deps": [
       "end2end_nosec_fixture_h2_uchannel", 
@@ -13083,34 +12980,6 @@
     "name": "h2_uchannel_compressed_payload_nosec_test", 
     "src": []
   }, 
-  {
-    "deps": [
-      "end2end_nosec_fixture_h2_uchannel", 
-      "end2end_nosec_test_default_host", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc_test_util_unsecure", 
-      "grpc_unsecure"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_default_host_nosec_test", 
-    "src": []
-  }, 
-  {
-    "deps": [
-      "end2end_nosec_fixture_h2_uchannel", 
-      "end2end_nosec_test_disappearing_server", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc_test_util_unsecure", 
-      "grpc_unsecure"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_disappearing_server_nosec_test", 
-    "src": []
-  }, 
   {
     "deps": [
       "end2end_nosec_fixture_h2_uchannel", 
@@ -13377,20 +13246,6 @@
     "name": "h2_uchannel_shutdown_finishes_tags_nosec_test", 
     "src": []
   }, 
-  {
-    "deps": [
-      "end2end_nosec_fixture_h2_uchannel", 
-      "end2end_nosec_test_simple_delayed_request", 
-      "gpr", 
-      "gpr_test_util", 
-      "grpc_test_util_unsecure", 
-      "grpc_unsecure"
-    ], 
-    "headers": [], 
-    "language": "c", 
-    "name": "h2_uchannel_simple_delayed_request_nosec_test", 
-    "src": []
-  }, 
   {
     "deps": [
       "end2end_nosec_fixture_h2_uchannel", 

tools/run_tests/tests.json

@@ -8709,42 +8709,6 @@
       "windows"
     ]
   }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_channel_connectivity_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_channel_ping_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
   {
     "ci_platforms": [
       "linux", 
@@ -8763,42 +8727,6 @@
       "windows"
     ]
   }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_default_host_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_disappearing_server_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
   {
     "ci_platforms": [
       "linux", 
@@ -9141,24 +9069,6 @@
       "windows"
     ]
   }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_simple_delayed_request_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
   {
     "ci_platforms": [
       "linux", 
@@ -14197,42 +14107,6 @@
       "windows"
     ]
   }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_channel_connectivity_nosec_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_channel_ping_nosec_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
   {
     "ci_platforms": [
       "linux", 
@@ -14251,42 +14125,6 @@
       "windows"
     ]
   }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_default_host_nosec_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_disappearing_server_nosec_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
   {
     "ci_platforms": [
       "linux", 
@@ -14629,24 +14467,6 @@
       "windows"
     ]
   }, 
-  {
-    "ci_platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ], 
-    "exclude_configs": [], 
-    "flaky": false, 
-    "language": "c", 
-    "name": "h2_uchannel_simple_delayed_request_nosec_test", 
-    "platforms": [
-      "linux", 
-      "mac", 
-      "posix", 
-      "windows"
-    ]
-  }, 
   {
     "ci_platforms": [
       "linux", 

vsprojects/buildtests_c.sln

@@ -6767,34 +6767,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_census_simple_r
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_channel_connectivity_test", "vcxproj\test\h2_uchannel_channel_connectivity_test\h2_uchannel_channel_connectivity_test.vcxproj", "{22A9730F-7F09-619E-13C0-C04E52B66CA3}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A} = {CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A}
-		{F278BE8B-2193-EF53-D97C-83653D70F181} = {F278BE8B-2193-EF53-D97C-83653D70F181}
-		{80EA2691-C037-6DD3-D3AB-21510BF0E64B} = {80EA2691-C037-6DD3-D3AB-21510BF0E64B}
-		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
-		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_channel_ping_test", "vcxproj\test\h2_uchannel_channel_ping_test\h2_uchannel_channel_ping_test.vcxproj", "{3F68F801-D04D-8931-215A-16996D32D539}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A} = {CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A}
-		{FFCD85F4-AF1E-D0BA-2F2B-28EFE4C543DB} = {FFCD85F4-AF1E-D0BA-2F2B-28EFE4C543DB}
-		{80EA2691-C037-6DD3-D3AB-21510BF0E64B} = {80EA2691-C037-6DD3-D3AB-21510BF0E64B}
-		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
-		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_compressed_payload_test", "vcxproj\test\h2_uchannel_compressed_payload_test\h2_uchannel_compressed_payload_test.vcxproj", "{9F612E82-D93F-F1B8-7C81-74815E60EF30}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -6809,34 +6781,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_compressed_payl
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_default_host_test", "vcxproj\test\h2_uchannel_default_host_test\h2_uchannel_default_host_test.vcxproj", "{56745EF7-1739-0B07-30D1-24975F6AC1A6}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A} = {CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A}
-		{AD4F70A8-9D60-52C3-8229-71EC6D08B034} = {AD4F70A8-9D60-52C3-8229-71EC6D08B034}
-		{80EA2691-C037-6DD3-D3AB-21510BF0E64B} = {80EA2691-C037-6DD3-D3AB-21510BF0E64B}
-		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
-		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_disappearing_server_test", "vcxproj\test\h2_uchannel_disappearing_server_test\h2_uchannel_disappearing_server_test.vcxproj", "{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A} = {CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A}
-		{73813A42-BD6E-4EB6-F246-ED8B0E206F9D} = {73813A42-BD6E-4EB6-F246-ED8B0E206F9D}
-		{80EA2691-C037-6DD3-D3AB-21510BF0E64B} = {80EA2691-C037-6DD3-D3AB-21510BF0E64B}
-		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
-		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_empty_batch_test", "vcxproj\test\h2_uchannel_empty_batch_test\h2_uchannel_empty_batch_test.vcxproj", "{001E89C3-317F-325A-D10D-ED5055B13C17}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -7103,20 +7047,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_shutdown_finish
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_simple_delayed_request_test", "vcxproj\test\h2_uchannel_simple_delayed_request_test\h2_uchannel_simple_delayed_request_test.vcxproj", "{76FF907D-F894-E38B-0C0B-606245E197F9}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A} = {CE17F95F-4FD3-41C3-E1B9-9B85F1FE7D4A}
-		{48406867-D147-4FF7-4283-65B9F32EF83D} = {48406867-D147-4FF7-4283-65B9F32EF83D}
-		{80EA2691-C037-6DD3-D3AB-21510BF0E64B} = {80EA2691-C037-6DD3-D3AB-21510BF0E64B}
-		{17BCAFC0-5FDC-4C94-AEB9-95F3E220614B} = {17BCAFC0-5FDC-4C94-AEB9-95F3E220614B}
-		{29D16885-7228-4C31-81ED-5F9187C7F2A9} = {29D16885-7228-4C31-81ED-5F9187C7F2A9}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_simple_request_test", "vcxproj\test\h2_uchannel_simple_request_test\h2_uchannel_simple_request_test.vcxproj", "{E4B00FAA-7A3C-7F7F-83FD-B58C0E706AED}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -9784,32 +9714,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_census_simple_r
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_channel_connectivity_nosec_test", "vcxproj\test\h2_uchannel_channel_connectivity_nosec_test\h2_uchannel_channel_connectivity_nosec_test.vcxproj", "{8EDD7365-8519-D34C-335A-60C3EC8228A2}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{6DF096AD-5865-3035-B7AE-5019FAC19EEB} = {6DF096AD-5865-3035-B7AE-5019FAC19EEB}
-		{D1F15DFE-14B5-78DB-4EC3-417727457273} = {D1F15DFE-14B5-78DB-4EC3-417727457273}
-		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF} = {0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}
-		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5} = {46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_channel_ping_nosec_test", "vcxproj\test\h2_uchannel_channel_ping_nosec_test\h2_uchannel_channel_ping_nosec_test.vcxproj", "{DE7D9B73-9DF4-90D6-AD94-441318202D97}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{6DF096AD-5865-3035-B7AE-5019FAC19EEB} = {6DF096AD-5865-3035-B7AE-5019FAC19EEB}
-		{39326613-BE6E-7800-EB08-20C0076BF14E} = {39326613-BE6E-7800-EB08-20C0076BF14E}
-		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF} = {0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}
-		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5} = {46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_compressed_payload_nosec_test", "vcxproj\test\h2_uchannel_compressed_payload_nosec_test\h2_uchannel_compressed_payload_nosec_test.vcxproj", "{D6FBB104-5E2A-7667-6F3C-AB576D093DC4}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -9823,32 +9727,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_compressed_payl
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_default_host_nosec_test", "vcxproj\test\h2_uchannel_default_host_nosec_test\h2_uchannel_default_host_nosec_test.vcxproj", "{D46F6F0D-576C-5B15-010E-53BE17AFF25E}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{6DF096AD-5865-3035-B7AE-5019FAC19EEB} = {6DF096AD-5865-3035-B7AE-5019FAC19EEB}
-		{EAD35938-4D82-EEA2-4B69-E827E6373A28} = {EAD35938-4D82-EEA2-4B69-E827E6373A28}
-		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF} = {0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}
-		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5} = {46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_disappearing_server_nosec_test", "vcxproj\test\h2_uchannel_disappearing_server_nosec_test\h2_uchannel_disappearing_server_nosec_test.vcxproj", "{F556E6B4-2533-8F01-1BC8-1ADA17D18928}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{6DF096AD-5865-3035-B7AE-5019FAC19EEB} = {6DF096AD-5865-3035-B7AE-5019FAC19EEB}
-		{35E47DEE-BA21-54D1-0A3E-6679C95C48F8} = {35E47DEE-BA21-54D1-0A3E-6679C95C48F8}
-		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF} = {0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}
-		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5} = {46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_empty_batch_nosec_test", "vcxproj\test\h2_uchannel_empty_batch_nosec_test\h2_uchannel_empty_batch_nosec_test.vcxproj", "{C02931DF-A1B5-6418-E436-4D6AB4C0258F}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -10096,19 +9974,6 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_shutdown_finish
 		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_simple_delayed_request_nosec_test", "vcxproj\test\h2_uchannel_simple_delayed_request_nosec_test\h2_uchannel_simple_delayed_request_nosec_test.vcxproj", "{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}"
-	ProjectSection(myProperties) = preProject
-        	lib = "False"
-	EndProjectSection
-	ProjectSection(ProjectDependencies) = postProject
-		{6DF096AD-5865-3035-B7AE-5019FAC19EEB} = {6DF096AD-5865-3035-B7AE-5019FAC19EEB}
-		{728FF02D-10A1-2AFC-6DC7-60F9D4AE68C3} = {728FF02D-10A1-2AFC-6DC7-60F9D4AE68C3}
-		{0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF} = {0A7E7F92-FDEA-40F1-A9EC-3BA484F98BBF}
-		{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5} = {46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}
-		{EAB0A629-17A9-44DB-B5FF-E91A721FE037} = {EAB0A629-17A9-44DB-B5FF-E91A721FE037}
-		{B23D3D1A-9438-4EDA-BEB6-9A0A03D17792} = {B23D3D1A-9438-4EDA-BEB6-9A0A03D17792}
-	EndProjectSection
-EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "h2_uchannel_simple_request_nosec_test", "vcxproj\test\h2_uchannel_simple_request_nosec_test\h2_uchannel_simple_request_nosec_test.vcxproj", "{BA21FD25-5FAB-E2E6-FFCB-AB7F190A4231}"
 	ProjectSection(myProperties) = preProject
         	lib = "False"
@@ -18507,38 +18372,6 @@ Global
 		{E96C6DE6-332D-41F7-0DAA-80716B635CEF}.Release-DLL|Win32.Build.0 = Release|Win32
 		{E96C6DE6-332D-41F7-0DAA-80716B635CEF}.Release-DLL|x64.ActiveCfg = Release|x64
 		{E96C6DE6-332D-41F7-0DAA-80716B635CEF}.Release-DLL|x64.Build.0 = Release|x64
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Debug|Win32.ActiveCfg = Debug|Win32
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Debug|x64.ActiveCfg = Debug|x64
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Release|Win32.ActiveCfg = Release|Win32
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Release|x64.ActiveCfg = Release|x64
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Debug|Win32.Build.0 = Debug|Win32
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Debug|x64.Build.0 = Debug|x64
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Release|Win32.Build.0 = Release|Win32
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Release|x64.Build.0 = Release|x64
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Debug-DLL|x64.Build.0 = Debug|x64
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Release-DLL|Win32.Build.0 = Release|Win32
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Release-DLL|x64.ActiveCfg = Release|x64
-		{22A9730F-7F09-619E-13C0-C04E52B66CA3}.Release-DLL|x64.Build.0 = Release|x64
-		{3F68F801-D04D-8931-215A-16996D32D539}.Debug|Win32.ActiveCfg = Debug|Win32
-		{3F68F801-D04D-8931-215A-16996D32D539}.Debug|x64.ActiveCfg = Debug|x64
-		{3F68F801-D04D-8931-215A-16996D32D539}.Release|Win32.ActiveCfg = Release|Win32
-		{3F68F801-D04D-8931-215A-16996D32D539}.Release|x64.ActiveCfg = Release|x64
-		{3F68F801-D04D-8931-215A-16996D32D539}.Debug|Win32.Build.0 = Debug|Win32
-		{3F68F801-D04D-8931-215A-16996D32D539}.Debug|x64.Build.0 = Debug|x64
-		{3F68F801-D04D-8931-215A-16996D32D539}.Release|Win32.Build.0 = Release|Win32
-		{3F68F801-D04D-8931-215A-16996D32D539}.Release|x64.Build.0 = Release|x64
-		{3F68F801-D04D-8931-215A-16996D32D539}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{3F68F801-D04D-8931-215A-16996D32D539}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{3F68F801-D04D-8931-215A-16996D32D539}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{3F68F801-D04D-8931-215A-16996D32D539}.Debug-DLL|x64.Build.0 = Debug|x64
-		{3F68F801-D04D-8931-215A-16996D32D539}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{3F68F801-D04D-8931-215A-16996D32D539}.Release-DLL|Win32.Build.0 = Release|Win32
-		{3F68F801-D04D-8931-215A-16996D32D539}.Release-DLL|x64.ActiveCfg = Release|x64
-		{3F68F801-D04D-8931-215A-16996D32D539}.Release-DLL|x64.Build.0 = Release|x64
 		{9F612E82-D93F-F1B8-7C81-74815E60EF30}.Debug|Win32.ActiveCfg = Debug|Win32
 		{9F612E82-D93F-F1B8-7C81-74815E60EF30}.Debug|x64.ActiveCfg = Debug|x64
 		{9F612E82-D93F-F1B8-7C81-74815E60EF30}.Release|Win32.ActiveCfg = Release|Win32
@@ -18555,38 +18388,6 @@ Global
 		{9F612E82-D93F-F1B8-7C81-74815E60EF30}.Release-DLL|Win32.Build.0 = Release|Win32
 		{9F612E82-D93F-F1B8-7C81-74815E60EF30}.Release-DLL|x64.ActiveCfg = Release|x64
 		{9F612E82-D93F-F1B8-7C81-74815E60EF30}.Release-DLL|x64.Build.0 = Release|x64
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Debug|Win32.ActiveCfg = Debug|Win32
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Debug|x64.ActiveCfg = Debug|x64
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Release|Win32.ActiveCfg = Release|Win32
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Release|x64.ActiveCfg = Release|x64
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Debug|Win32.Build.0 = Debug|Win32
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Debug|x64.Build.0 = Debug|x64
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Release|Win32.Build.0 = Release|Win32
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Release|x64.Build.0 = Release|x64
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Debug-DLL|x64.Build.0 = Debug|x64
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Release-DLL|Win32.Build.0 = Release|Win32
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Release-DLL|x64.ActiveCfg = Release|x64
-		{56745EF7-1739-0B07-30D1-24975F6AC1A6}.Release-DLL|x64.Build.0 = Release|x64
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Debug|Win32.ActiveCfg = Debug|Win32
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Debug|x64.ActiveCfg = Debug|x64
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Release|Win32.ActiveCfg = Release|Win32
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Release|x64.ActiveCfg = Release|x64
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Debug|Win32.Build.0 = Debug|Win32
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Debug|x64.Build.0 = Debug|x64
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Release|Win32.Build.0 = Release|Win32
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Release|x64.Build.0 = Release|x64
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Debug-DLL|x64.Build.0 = Debug|x64
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Release-DLL|Win32.Build.0 = Release|Win32
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Release-DLL|x64.ActiveCfg = Release|x64
-		{50D47DA6-0257-8580-FCCE-C193CD9AE2F7}.Release-DLL|x64.Build.0 = Release|x64
 		{001E89C3-317F-325A-D10D-ED5055B13C17}.Debug|Win32.ActiveCfg = Debug|Win32
 		{001E89C3-317F-325A-D10D-ED5055B13C17}.Debug|x64.ActiveCfg = Debug|x64
 		{001E89C3-317F-325A-D10D-ED5055B13C17}.Release|Win32.ActiveCfg = Release|Win32
@@ -18891,22 +18692,6 @@ Global
 		{A43C8463-D0E1-300B-6899-44A84105E59E}.Release-DLL|Win32.Build.0 = Release|Win32
 		{A43C8463-D0E1-300B-6899-44A84105E59E}.Release-DLL|x64.ActiveCfg = Release|x64
 		{A43C8463-D0E1-300B-6899-44A84105E59E}.Release-DLL|x64.Build.0 = Release|x64
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Debug|Win32.ActiveCfg = Debug|Win32
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Debug|x64.ActiveCfg = Debug|x64
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Release|Win32.ActiveCfg = Release|Win32
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Release|x64.ActiveCfg = Release|x64
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Debug|Win32.Build.0 = Debug|Win32
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Debug|x64.Build.0 = Debug|x64
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Release|Win32.Build.0 = Release|Win32
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Release|x64.Build.0 = Release|x64
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Debug-DLL|x64.Build.0 = Debug|x64
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Release-DLL|Win32.Build.0 = Release|Win32
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Release-DLL|x64.ActiveCfg = Release|x64
-		{76FF907D-F894-E38B-0C0B-606245E197F9}.Release-DLL|x64.Build.0 = Release|x64
 		{E4B00FAA-7A3C-7F7F-83FD-B58C0E706AED}.Debug|Win32.ActiveCfg = Debug|Win32
 		{E4B00FAA-7A3C-7F7F-83FD-B58C0E706AED}.Debug|x64.ActiveCfg = Debug|x64
 		{E4B00FAA-7A3C-7F7F-83FD-B58C0E706AED}.Release|Win32.ActiveCfg = Release|Win32
@@ -22187,38 +21972,6 @@ Global
 		{EA698246-2F18-5DB1-66C4-9216E5DCC13A}.Release-DLL|Win32.Build.0 = Release|Win32
 		{EA698246-2F18-5DB1-66C4-9216E5DCC13A}.Release-DLL|x64.ActiveCfg = Release|x64
 		{EA698246-2F18-5DB1-66C4-9216E5DCC13A}.Release-DLL|x64.Build.0 = Release|x64
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Debug|Win32.ActiveCfg = Debug|Win32
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Debug|x64.ActiveCfg = Debug|x64
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Release|Win32.ActiveCfg = Release|Win32
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Release|x64.ActiveCfg = Release|x64
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Debug|Win32.Build.0 = Debug|Win32
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Debug|x64.Build.0 = Debug|x64
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Release|Win32.Build.0 = Release|Win32
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Release|x64.Build.0 = Release|x64
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Debug-DLL|x64.Build.0 = Debug|x64
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Release-DLL|Win32.Build.0 = Release|Win32
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Release-DLL|x64.ActiveCfg = Release|x64
-		{8EDD7365-8519-D34C-335A-60C3EC8228A2}.Release-DLL|x64.Build.0 = Release|x64
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Debug|Win32.ActiveCfg = Debug|Win32
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Debug|x64.ActiveCfg = Debug|x64
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Release|Win32.ActiveCfg = Release|Win32
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Release|x64.ActiveCfg = Release|x64
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Debug|Win32.Build.0 = Debug|Win32
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Debug|x64.Build.0 = Debug|x64
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Release|Win32.Build.0 = Release|Win32
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Release|x64.Build.0 = Release|x64
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Debug-DLL|x64.Build.0 = Debug|x64
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Release-DLL|Win32.Build.0 = Release|Win32
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Release-DLL|x64.ActiveCfg = Release|x64
-		{DE7D9B73-9DF4-90D6-AD94-441318202D97}.Release-DLL|x64.Build.0 = Release|x64
 		{D6FBB104-5E2A-7667-6F3C-AB576D093DC4}.Debug|Win32.ActiveCfg = Debug|Win32
 		{D6FBB104-5E2A-7667-6F3C-AB576D093DC4}.Debug|x64.ActiveCfg = Debug|x64
 		{D6FBB104-5E2A-7667-6F3C-AB576D093DC4}.Release|Win32.ActiveCfg = Release|Win32
@@ -22235,38 +21988,6 @@ Global
 		{D6FBB104-5E2A-7667-6F3C-AB576D093DC4}.Release-DLL|Win32.Build.0 = Release|Win32
 		{D6FBB104-5E2A-7667-6F3C-AB576D093DC4}.Release-DLL|x64.ActiveCfg = Release|x64
 		{D6FBB104-5E2A-7667-6F3C-AB576D093DC4}.Release-DLL|x64.Build.0 = Release|x64
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Debug|Win32.ActiveCfg = Debug|Win32
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Debug|x64.ActiveCfg = Debug|x64
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Release|Win32.ActiveCfg = Release|Win32
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Release|x64.ActiveCfg = Release|x64
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Debug|Win32.Build.0 = Debug|Win32
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Debug|x64.Build.0 = Debug|x64
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Release|Win32.Build.0 = Release|Win32
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Release|x64.Build.0 = Release|x64
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Debug-DLL|x64.Build.0 = Debug|x64
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Release-DLL|Win32.Build.0 = Release|Win32
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Release-DLL|x64.ActiveCfg = Release|x64
-		{D46F6F0D-576C-5B15-010E-53BE17AFF25E}.Release-DLL|x64.Build.0 = Release|x64
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Debug|Win32.ActiveCfg = Debug|Win32
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Debug|x64.ActiveCfg = Debug|x64
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Release|Win32.ActiveCfg = Release|Win32
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Release|x64.ActiveCfg = Release|x64
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Debug|Win32.Build.0 = Debug|Win32
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Debug|x64.Build.0 = Debug|x64
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Release|Win32.Build.0 = Release|Win32
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Release|x64.Build.0 = Release|x64
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Debug-DLL|x64.Build.0 = Debug|x64
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Release-DLL|Win32.Build.0 = Release|Win32
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Release-DLL|x64.ActiveCfg = Release|x64
-		{F556E6B4-2533-8F01-1BC8-1ADA17D18928}.Release-DLL|x64.Build.0 = Release|x64
 		{C02931DF-A1B5-6418-E436-4D6AB4C0258F}.Debug|Win32.ActiveCfg = Debug|Win32
 		{C02931DF-A1B5-6418-E436-4D6AB4C0258F}.Debug|x64.ActiveCfg = Debug|x64
 		{C02931DF-A1B5-6418-E436-4D6AB4C0258F}.Release|Win32.ActiveCfg = Release|Win32
@@ -22571,22 +22292,6 @@ Global
 		{D529BC7A-1F61-D263-CC9C-B33280F87875}.Release-DLL|Win32.Build.0 = Release|Win32
 		{D529BC7A-1F61-D263-CC9C-B33280F87875}.Release-DLL|x64.ActiveCfg = Release|x64
 		{D529BC7A-1F61-D263-CC9C-B33280F87875}.Release-DLL|x64.Build.0 = Release|x64
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Debug|Win32.ActiveCfg = Debug|Win32
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Debug|x64.ActiveCfg = Debug|x64
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Release|Win32.ActiveCfg = Release|Win32
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Release|x64.ActiveCfg = Release|x64
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Debug|Win32.Build.0 = Debug|Win32
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Debug|x64.Build.0 = Debug|x64
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Release|Win32.Build.0 = Release|Win32
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Release|x64.Build.0 = Release|x64
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Debug-DLL|Win32.ActiveCfg = Debug|Win32
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Debug-DLL|Win32.Build.0 = Debug|Win32
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Debug-DLL|x64.ActiveCfg = Debug|x64
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Debug-DLL|x64.Build.0 = Debug|x64
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Release-DLL|Win32.ActiveCfg = Release|Win32
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Release-DLL|Win32.Build.0 = Release|Win32
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Release-DLL|x64.ActiveCfg = Release|x64
-		{E1F27F66-E3A7-2E99-B76A-970E6DD66C36}.Release-DLL|x64.Build.0 = Release|x64
 		{BA21FD25-5FAB-E2E6-FFCB-AB7F190A4231}.Debug|Win32.ActiveCfg = Debug|Win32
 		{BA21FD25-5FAB-E2E6-FFCB-AB7F190A4231}.Debug|x64.ActiveCfg = Debug|x64
 		{BA21FD25-5FAB-E2E6-FFCB-AB7F190A4231}.Release|Win32.ActiveCfg = Release|Win32

vsprojects/vcxproj/test/h2_uchannel_channel_connectivity_nosec_test/h2_uchannel_channel_connectivity_nosec_test.vcxproj

@@ -1,190 +0,0 @@
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-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\grpc.dependencies.openssl.props" Condition="Exists('..\..\..\..\vsprojects\packages\grpc.dependencies.openssl.1.0.204.1\build\native\1.0.204.1.props')" />
-  <ItemGroup Label="ProjectConfigurations">
-    <ProjectConfiguration Include="Debug|Win32">
-      <Configuration>Debug</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Debug|x64">
-      <Configuration>Debug</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|Win32">
-      <Configuration>Release</Configuration>
-      <Platform>Win32</Platform>
-    </ProjectConfiguration>
-    <ProjectConfiguration Include="Release|x64">
-      <Configuration>Release</Configuration>
-      <Platform>x64</Platform>
-    </ProjectConfiguration>
-  </ItemGroup>
-  <PropertyGroup Label="Globals">
-    <ProjectGuid>{8EDD7365-8519-D34C-335A-60C3EC8228A2}</ProjectGuid>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
-  <PropertyGroup Condition="'$(VisualStudioVersion)' == '10.0'" Label="Configuration">
-    <PlatformToolset>v100</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(VisualStudioVersion)' == '11.0'" Label="Configuration">
-    <PlatformToolset>v110</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(VisualStudioVersion)' == '12.0'" Label="Configuration">
-    <PlatformToolset>v120</PlatformToolset>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>true</UseDebugLibraries>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
-    <ConfigurationType>Application</ConfigurationType>
-    <UseDebugLibraries>false</UseDebugLibraries>
-    <WholeProgramOptimization>true</WholeProgramOptimization>
-    <CharacterSet>Unicode</CharacterSet>
-  </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
-  <ImportGroup Label="ExtensionSettings">
-  </ImportGroup>
-  <ImportGroup Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="..\..\..\..\vsprojects\global.props" />
-    <Import Project="..\..\..\..\vsprojects\openssl.props" />
-    <Import Project="..\..\..\..\vsprojects\winsock.props" />
-    <Import Project="..\..\..\..\vsprojects\zlib.props" />
-  </ImportGroup>
-  <PropertyGroup Label="UserMacros" />
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